In this chemical Formula for Ammonia, the Subscripts indicate what?

A. When added together, we know that Nitrogen and Hydrogen combined create four molecules of Ammonia

B. There are two atoms of Nitrogen and two atoms of Hydrogen combined to make Ammonia.

C. There are two molecules of Nitrogen and two molecules of Hydrogen combined to make Ammonia

D. The compound N2 and the compound H2 make Ammonia