What would be the correct order of steps needed to perform this task?

Chris has lost SIC communication with his Security Gateway and he needs to re-establish SIC.

What would be the correct order of steps needed to perform this task?

A.
3, 1, 4, 2

B.
2, 3, 1, 4

C.
5, 1, 2, 4

D.
5, 1, 4, 2

Explanation: