You don't need to explain why the correct choice is not obvious. But answer: Suppose in the end you decide to go with the well prepared but unknown professional. What could you do to incentivize good work and deal with the moral hazard problem?

You have two candidates for the new manager job. The first is very well-prepared, but you do not know if he is a trustworthy person. The second is your cousin. He does not understand much of management, but you really trust him. Explain why the correct choice is not obvious