Answer:
c. Jupiter's radius is 10 times the Earth's radius
Step-by-step explanation:
The weight of a person on the surface of a planet is equal to the gravitational pull exerted by the planet on the person:

where
is the gravitational constant
M is the mass of the planet
m is the mass of the person
R is the radius of the planet
The weight of a person on Earth is given by:

where
is the mass of the Earth and
is the Earth's radius.
We know that Jupiter's mass is 300 times the Earth's mass:

while Jupiter's radius is 10 times the Earth's radius:

So, the weight of the person on Jupiter is

So, the weight would be only 3 times as much.