Respuesta :
Answer:
C) "a proper stimulus."
Explanation:
A driving force is used to express that someone has a big motivation or a big reason to do something, as well as a huge incentive, or a large motivation, it is used to express that someone has big willing on doing something, a proper stimulus is a motivation that is not necesarily big or smal, it´s just enough to make the person do the thing he has to do.