question which had four choices: E, MC, P, C

I chose Executing initially and double-checked it with PMBOK, p. 260.  - Distribute Information Outputs: OPA Updates

Approved changes is mentioned as Stakeholder notifications which is part of Distribute Information Output.

So I believe that my choice was correct.

However, the author believes it is MC.

Please advise if there is any reason I should change my opinion.