How often should you and the project team do risk identification?

You and your project team are just starting the risk identification activities for a project that is scheduled to last for 18 months. Your project team has already identified a long list of risks that need to be analyzed. How often should you and the project team do risk identification?

A.
At least once per month

B.
Identify risks is an iterative process.

C.
It depends on how many risks are initially identified.

D.
Several times until the project moves into execution