When will single, double, or even triple bonds form in a compound?

Double and triple covalent bonds are stronger than single covalent bonds ... Double and triple bonds offer added stability to compounds, and restrict any rotation around the bond axis.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

i think it's c. i'm not sure but i think so.