You need to upgrade to SSRS 2012 with the minimum downtime and hardware requirements

You have a SQL Server Reporting Services (SSRS) 2008 instance integrated with an
Internet-facing Microsoft SharePoint 2010 farm. PerformancePoint Services and Excel
Services are installed and configured.
You need to upgrade to SSRS 2012 with the minimum downtime and hardware
requirements.
What should you do? (More than one answer choice may achieve the goal. Select the BEST
answer.)

A.
Migrate SSRS content to a separate instance of SSRS 2012 on the same server.

B.
Perform an in-place upgrade of the SSRS environment.

C.
Migrate SSRS content to new servers that run SSRS 2012.

D.
Install SSRS 2012 on a new SharePoint farm and migrate content to the new farm.