You need to ensure that the employee can use Lync

You are the Office 365 administrator for your company. Executive employees have been assigned E3
licenses. Non-executive employees have been assigned El licenses.
An employee who is not on the executive team wants to communicate with executive team
members by using Microsoft Lync instant messaging.
You need to ensure that the employee can use Lync.
What should you do?

A.
Sign in to the Office 365 portal and use Office on Demand.

B.
Sign in to the Office 365 portal and then run the Office 365 Desktop Setup.

C.
Sign in to the Office 365 portal and then download and install Office 365 ProPlus.

D.
Sign in to the Office 365 portal and then download and install the Lync Basic desktop client.