/sci/ - Science & Math

Does Nietzschean eternal reccurrence work for you?

Alright lads, I'll need your amassed brainpower for a second.
I need to mark the correct alternative. The options are:
a) Mass and weight are the same thing in different units.
b) If an object has no weight, it shouldn't have mass.
c) If an object's weight varies, so should its mass.
d) Weight is proportional to mass.

a) is wrong, because it's obviously retarded.
b) is, strictly speaking, incorrect, because it could have mass and no weight if it's under the effect of no gravitational force. I'll shelf it.
c) clearly assumes a constant gravitational force, so I'll shelf it too.
d) is also true assuming constant gravitational force.

Now, if we assume constant gravitational force, both c) and d) are true, except only one is true, so the correct answer should be b), right?