Assume Component a Provides an Interface P and Requires an Interface

Multiple Choice

Assume component A provides an interface P and requires an interface R. In order for a component B to be substituted for component A, what must be true?

A) The interface that B requires must be type conformant with respect to the interface that A provides.
B) The interface that B requires must be type conformant with respect to the interface that A requires, and the interface that B provides must be type conformant with respect to the interface that A provides.
C) The interface that A requires must be type conformant with respect to the interface that B provides.
D) Components must be related to each other via a dependency.