If Malik weighs 100 N on Earth, and Alexander weighs 100 N on the Moon, how do their masses compare to one another?

a
Malik and Alexander have the same mass.
b
Alexander's and Malik's masses cannot be compared.
c
Alexander's mass is greater than Malik’s.
d
Malik's mass is greater than Alexander’s.

b (Alexander's weight on the Moon does not provide enough information to compare his mass with Malik's mass on Earth)