Which statement would be true if a person is measured on the moon, and on Earth?

There is something called the rule of matter in science. Matter cannot be created or destroyed. Now, provided that the person is not decaying in space or on earth and is alive on the other, the mass in this person would remain the exact same. This means that answer D: the mass would be the same on the moon as it is on earth.

Now, if we were talking weight, that’s a different story. Neil Armstrong lost quite a bit of weight on the moon from the lack of gravity and the ease with which he was able to spring around. That’s just the cut of the cloth, and it’s not going to change for anyone who goes to the moon. Weight changes; mass does not.