The manner in which the fat left your friends body is that it was released as CO2 and H2O.
Yes, because even though a theory has a lot of evidence to support it, it is not always true. Theories are different from facts because they are not 100% This is proven many times in history. For example, many people used to believe that the sun rotated around the sun. It was not until many years later did they realize there mistake.
B, I think. Tell me if it's correct once you submit it! (Im doing the test rn as well lol)