In order to solve this, you need to know how to compute weight when on the moon. The astronaut weighs 700N on earth. This can be multiplied by the moon’s gravity which is 0.165. Once you get the answer which is letter D, then that is the astronaut’s weight on the moon.
You have to remember that even if people would weigh less once they are on the moon, their body’s overall mass will still remain the same. This means that once the astronaut gets back to earth, the weight once again will become 700N when computed. This will only change if the astronaut has lost weight while doing the expedition.