18. The planet Jupiter is about 300 times as massive as earth, yet on its surface you would weight only about 3 times as much. This is because
(a) your mass is 100 times less on Jupiter.
(b) Jupiter is significantly farther from the sun.
(c) Jupiter's radius is 10 times the earth's radius.
(d) you are 100 times more weightless there.
(e) none of these.