Please if you are not sure from your answer 100% do not answer the question. Thanks in advance.

A security analyst is attempting to break into a client's secure network. The analyst was not given prior information a public IP addresses that are currently in use. After network enumeration, the analyst's NEXT step is to perform: about the client, except for a block of a gray-box penetration test. ? ?. O D. ??. a risk analysis. a vulnerability assessment an external security audit. a red team exercise