Access control that is a function of factors such as location, time of day,
and previous access history is called:

A.
Information flow

B.
Context-dependent

C.
Positive

D.
Content-dependent

Explanation:
In answer “Context-dependent”, access is determined by the context of the decision as
opposed to the information contained in the item being accessed. The
latter is referred to as content-dependent access control. In contentdependent access control, for example, the manager of a department
may be authorized to access employment records of a department
employee, but may not be permitted to view the health records of the
employee.
* The term positive in access control refers to

positive access rights, such as read or write. Denial rights, such as denial
to write to a file, can also be conferred upon a subject.
* Information flowdescribes a class of access control models. An information flow model is described by the set consisting of object, flow policy,
states, and rules describing the transitions among states.