Which of the following statements are correct regarding the use of management stages?
1. Provide review and decision points
2. Enable key decisions to be made prior to the detailed work
3. Facilitate the manage by exception principle
4. Enables the project manager to have complete autonomy over the products to be produced

A.
1, 2, 3

B.
1, 2, 4

C.
1, 3, 4

D.
2, 3, 4