What is a possible solution?

A user notifies an administrator that Content Libraries are not visible.
What is a possible solution?

A.
Assign the user the read-only role at the global permission level.

B.
Assign the user the read-only role at the vCenter Server root level.

C.
Assign the user the read-only role at the vCenter Server data center level.

D.
Assign the user the read-only role at the vCenter Server cluster level.

Explanation:
Explanation/Reference: