Interesting pmp questions which I cannot find right answer.

Q1. Sebastian is a project manager in charge of an R&D project. The project has completed phase 1 and is moving into the next phase of the
project.  What is the process he has to plan for, to ensure that the project requirements have been met in phase 1
and the project can move to the next phase?

a. Verify Scope
b. Close project or Phase
c. Nothing to do
d. Quality Contol