A project manager in a software company is working on a highly confidential project. One developer often works late and carries a large bag to work daily. The project manager learns that the developer's brother$-$in$-$law works for a competitor company and that they have been meeting for lunch.

What should the project manager do first?

Question $5$ options:

Escalate these suspicions to the project sponsor and seek guidance.

Report the developer to the company's security department and let them assess the threat.

Check that the developer has signed the nondisclosure agreement $($NDA$)$ and revisit the team charter with the team.

Watch the developer closely for a week and ensure nothing is removed from the office.