To answer #7 which would be the first part, the reason why you would weigh less in space then you're on earth is mainly because the gravitational force would obviously be different and also because.
So, based from your options listed above, we would want to gather what we have discussed, and see how this would then relate to what we have been understanding.
Your correct answer would then be (option C) mainly because this statement would be very true. The gravitational pull would have a lot to do with the mass that we would contain.