What should you do to ensure that users can receive SMS alerts?

Your network contains a server farm that has Microsoft SharePoint Foundation 2010 installed.

You need to ensure that users can receive SMS alerts.
What should you do?

A.
Configure the User Alerts settings.

B.
Configure the Send To Connections.

C.
Modify the Outgoing E-Mail Settings.

D.
Modify the Mobile Accounts Settings.

Explanation/Reference:
Configure a mobile account (SharePoint Foundation 2010)

This article discusses how to configure and manage a mobile account for Microsoft SharePoint Foundation 2010 to enable users to subscribe to alerts that are sent by using Short Message Service (SMS). The alerts are sent to users’ mobile phones when changes are made to a SharePoint list or item.
The mobile alert feature resembles a feature that already exists in SharePoint Foundation 2010 that enables outgoing e-mail alerts. However, instead of receiving alerts via e-mail when changes are made in a SharePoint list or item, users receive the alerts on their mobile phones. For more information about e-mail alerts, see Configure outgoing e-mail (SharePoint Foundation 2010).
A SharePoint site is usually located on an intranet. As a result, access to the SharePoint site can be difficult when users are away from the office — for example, when they are traveling or attending a business dinner. The mobile alert feature enables users to react quickly when they receive an SMS alert that an item in a SharePoint list has changed.

Configure a mobile account
You can configure a mobile account for a server farm or for a specific Web application, either by using Central Administration or Windows PowerShell.

Note: If you cannot configure a mobile account, you may have the wrong certificate file. In that case, contact your service provider.
If you cannot configure a mobile account, you may have the wrong certificate file. In that case, contact your service provider.

To configure or edit a mobile account for a server farm by using Central Administration
1. Verify that you have the following administrative credentials:
* To configure a mobile account for a server farm, you must be a member of the Farm Administrators group on the computer that is running the SharePoint Central Administration Web site.
2. On the Central Administration Home page, click System Settings.
3. On the System Settings page, in the E-Mail and Text Messages (SMS) section, click Configure mobile account.
4. On the Mobile Account Settings page, in the Text Message (SMS) Service Settings section, click the Microsoft Office Online link to access a list of service providers.
5. On the Find an Office 2010 Mobile Service Provider page, in the Choose your wireless service provider’s country/region list, select the country or region in which your wireless service provider is located.
6. On the Find an Office 2010 Mobile Service Provider page, in the Choose your current wireless service provider list, select the wireless service provider that you want to use.
After you make this selection, you are directed to the Web site of the service provider that you selected. On the Web site, you apply for the SMS service. When you receive the required information from the service provider, return to the Mobile Accounts Settings page.
7. In the The URL of Text Message (SMS) Service box, type the URL of the SMS service.
Note: Ensure that the service URL you enter is an HTTPS URL.
8. In the User Name box and Password box, type the user name and password that you received from the SMS service provider.
9. To confirm that the URL and user credentials are correct, click Test Service.
10. Click OK.

Source: http://technet.microsoft.com/en-us/library/ee428292.aspx