Answer:
c. Kleenex
Explanation:
Generic term by definition, is a phrase or a  word that is popularly used by people to describe some general class of products. Best example among the choices given is Kleenex. All product belonging to that class sanitary hand tissues are mostly referred to as Kleenex  rather than their own specific characteristic or brand name. Due to its popularity and significance, Kleenex has become the generic name.
