Which three major areas are supported by the SAP SM during operations? More than one answer is correct. Please choose the correct answers.

Which three major areas are supported by the SAP SM during operations? More than one answer is correct. Please choose the correct answers.
A . Support Desk
B . Technical implementations
C . Computer center management system
D . Operations (management)
E . Process reengineering
F . Solution monitoring

Answer: A,D,F