Where can you most likely see the reason for the error?

During the SUM procedure, the phase XPRAS_AIMMRG fails.

Where can you most likely see the reason for the error? There are 2 correct answers to this question.
A . In the latest log files in the SUM directory, subdirectory ABAP, subdirectory tmp
B . In the latest log files in the SUM directory, subdirectory ABAP, subdirectory log
C . In the job log for the corresponding job in SM37 (Job Overview)
D . In the corresponding R3trans log files of this phase

Answer: B,C