You need to ensure that all users can display SharePoint lists in the Datasheet view

You are the Office 365 administrator for your company. Employees do not have local administrative
privileges on client computers.
The company has the following client computer software:
Windows 7 and Windows 8
32-bit and 64-bit Office 2007, Office 2010, and Office 2013
When accessing the corporate Microsoft SharePoint 2010 site, some users are unable to display
SharePoint lists in the Datasheet view.
You need to ensure that all users can display SharePoint lists in the Datasheet view.
What should you do?

A.
Upgrade to the latest version of Office 365 ProPlus.

B.
Force a reinstallation of Office by using Group Policy and specifying a network location.

C.
Uninstall the 64-bit version of Office and then install the 32-bit version of Office.

D.
Upgrade all Office 2007 and Office 2010 versions to Office 2013.

Explanation:
A 64-bit version of the Datasheet component is not available for Office 2010.
http://support.microsoft.com/kb/2266203/en-us
http://support.microsoft.com/kb/909506