You need to improve the performance of the computer

You administer a desktop computer that has the following hardware specifications:
• Dual-core 2.5GHz processor
• 1GB RAM
• 25GB unpartitioned disk space
• Onboard graphics that has WDDM 1.0
You install a customized Windows 7 Enterprise 64-bit image on the computer by using unpartitioned
disk space. The computer operates unacceptably slow.
You need to improve the performance of the computer.
What should you do?

A.
Upgrade the RAM to 1 GB.

B.
OpenTaks Manager. Set the priority of all SYSTEM processes to High.

C.
Open Performance Monitor. Run the System Performance Data Collector Set.

D.
Perform the initial Windows Experience Index Run.

Explanation:
http://windows.microsoft.com/en-us/windows7/products/system-requirements
Should have 2GB RAM as a minimum.