Galileo . did not believe friction existed

believed that friction stopped objects in motion

believed that friction kept objects in motion

assumed that in a frictionless environment objects would never move

friction help to slow motion in other word it oppose motion, but in a frictionless environment object would move with difficult stopping point.

C believed that friction kept objects in motion

Explanation: Galileo wold say that due to inertia, the ball would keep moving forever, if it were not slowed to a stop by friction.

Hope it helps!

answer; /// the above statement is (true);