Increasing temperature can: -change the phase of matter -increase the number of protons -decrease the mass of matter -add neutrons to the nucleus of an atom

The answer would be A. You cannot decrease mass because of increasing temp so it can't be C and adding neutrons or protons would be changing the atom and therefore the element, and that is not possible through just an increase of temperature, so it can't be B or D. Hope this was helpful! ;)

answer///carbon;