Which three elements make up most of the human body A. Ba, N, Sn
B. B, C, Ne
C. C, H, O
D. Au, Ag, C

C. C, H, O

Explanation:

The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.

carbohydrates are the body's preferred source of energy.

rain is the best answer