Answer: B. HAS-A relationship.
The HAS-A relationship refers to a composition relationship that makes provision for the use of random variables to draw deductive reference to other objects.
It is a composition relationship that has proved to be invaluable when reusing codes. It creates a way to draw a correlational line between variables, and to show how they fit in the composite relationship.
Generally, HAS-A relationships are used to create generalized inferences between variables by emphasizing on the connection between them.