Final answer:
The force exerted by the floor on the glass is downward.
Step-by-step explanation:
The direction of the force exerted by the floor on the glass is C. downward.
When an object falls, it experiences the force of gravity pulling it downward. When the glass falls and hits the floor, the floor exerts an equal and opposite force on the glass, according to Newton's third law of motion.
The force exerted by the floor on the glass is directed downward to support the weight of the glass and stop it from falling further.