Which of these are objectives of Service Level Management

1: Defining, documenting and agreeing the level of IT Services to be provided
2: Monitoring, measuring and reporting the actual level of services provided
3: Monitoring and improving customer satisfaction
4: Identifying possible future markets that the Service Provider could operate in

A.
1, 2 and 3 only

B.
1 and 2 only

C.
1, 2 and 4 only

D.
All of the above