I believe the answer is C. This is because most men do naturally have more muscle mass, so they need more energy to function. This is not the case if you do a lot of muscle building activities, though.
Because children start out with the brain and the cells that they initially had. One thing that does not change is the personality you have a personality from the day you are born. The personality is the way you are when you are born and cells create your body and your mind. This is stable because it is like your chromosomes predetermined and does not change.
Hope this helps!
B or D, although I'm not sure which
