Which planet has the most important role in changing the direction of a comet's path? A.
Earth because of its atmosphere of nitrogen and carbon dioxide

B.
Mars because of its position near the asteroid belt

C.
Jupiter because of its strong gravitational force

D.
Saturn because of its large ring system

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.