Answer: D.

Explanation:
Firstly, we know the weight of a person (let's call it person 1) is
and the weight of the same person 1 on Saturn is
.
Now, we want to know the weight of a second person (person 2) on Saturn, but we only know its weight on Earth, which is
.
This problem can be solved by the Rule of Three, which is mathematical rule to find out an amount that is with another quantity given in the same relation as other two also known:
Earth Saturn
-------

--------

Finding
:

Rearranging the equation:
