As a Project Manager on replacing 2 miles of sewer pipe part of your job is to determine if there are changes to the scope of the project?

B. Controlling............

Contract document shall be read to understand if the same is in scope or not. If ambiguity is there, project manager shall raise concern flag and / or change order, at the earliest opportunity, so that clarity is established before execution with or without a change order.

Option (B) Controlling --------

Option-B Controlling...............

b) Controlling is the correct answer.

C.  those procedures belongs to planning phase. 

i think these belong in C)