What is the most efficient way to troubleshoot this issue?

A technician has a server in production. The iDRAC SEL log indicates a possible issue with DIMMs A1 and A2. Firmware is up to date.

What is the most efficient way to troubleshoot this issue?
A . Reseat DIMMs A1 and A2
B . Swap DIMMs A1 and A2 to B1 and B2
C . Swap DIMMs A1 and A2 to A3 and A4
D . Swap DIMMs A1 and A2 to B1 and B3

Answer: A