Andrea and the other members of the tennis team are practicing hitting tennis balls. If two people hit identical balls at the same time, which ball has the most kinetic energy?
A.
the ball that stops moving first
B.
the ball that travels the farthest distance from the ground
C.
the ball that lands the shortest distance away
D.
the ball that moves at the fastest speed

It shows that the experiment is designed properly.

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.