The project manager has completed the project management plan and sent it to the sponsor, other key stakeholders, and team leads for their approval. Upon review, one of the team leads notices an important activity is missing and requests that it be added to the project management plan. What should the project manager do$?$

Perform an impact analysis of the missing activity.

Submit a change request because the team lead has already performed the impact analysis and stated that the activity needs to be added.

Advise the team lead that adding the activity at this stage is gold plating.

Add the missing activity to the project management plan.