Which of the following statements best describes how group policies affect permissions?

a. Permissions are not inherited from a parent group to a child group.

b. Permissions are inherited from a parent group to a child group as long as a parent group permission is not contradicted by the child group permission.

c. Permissions are inherited on a cumulative basis, from parent group to child group unless permission inheritance is disabled.

d. Groups cannot be nested, so there are no permission inheritance issues with groups.