Which two methods can you use to achieve this goal?

You are the Office 365 administrator for your company. The company environment includes Office
2007, Office 2010, Office 2013, Windows 7, and Windows 8. Office Telemetry logging has been
enabled in the environment.
The company plans to use coauthoring.
You need to gather information about Microsoft Excel XLS real-time data (RTD) add-ins.
Which two methods can you use to achieve this goal? Each correct answer presents a complete
solution.

A.
Open workbooks by using Excel 2013 on client computers that run Windows 7.

B.
Open workbooks by using Excel 2013 on client computers that run Windows 8.

C.
Open workbooks by using Excel 2007 or Excel 2010 on client computers that run Windows 7.

D.
Open workbooks by using Excel 2007 or Excel 2010 on client computers that run Windows 8.

Explanation:
http://msdn.microsoft.com/en-us/library/office/jj230106(v=office.15).aspx
http://technet.microsoft.com/en-us/library/jj863580(v=office.15).aspx