Which of the following activities are helped by recording relationships between Configuration Items (CIs)?

1. Assessing the impact and cause of Incidents and Problems
2. Assessing the impact of proposed Changes
3. Planning and designing a Change to an existing service
4. Planning a technology refresh or software upgrade

A.
1 and 2 only

B.
All of the above

C.
1, 2 and 4 only

D.
1, 3 and 4 only