Which of these should a change model include?
1.	The steps that should be taken to handle the change
2.	Responsibilities; who should do what, including escalation
3.	Timescales and thresholds for completion of the actions
4.	Complaints procedures
A. 1, 2 and 3 only
B. All of the above
C. 1 and 3 only
D. 2 and 4 only