What is the difference between least privilege and need to know?

A.
A user should have least privilege that restricts her need to know.

B.
A user should have a security clearance to access resources, a need to know about those resources, and least privilege to give her full control of all resources.

C.
A user should have a need to know to access particular resources, and least privilege should be implemented to ensure she only accesses the resources she has a need to know.

D.
They are two different terms for the same issue.

Explanation:
C: Users should be able to access only the resources they need to fulfill the duties of their positions. They also should only have the level of permissions and rights for those resources that are required to carry out the exact operations they need for their jobs, and no more. This second concept is more granular than the first, but they have a symbiotic relationship.