Question

What is a factor that drives chemical reactions?

tendency to have less energy
tendency to have less mass
tendency to burn
tendency to condense

Tends to burn right?

Answer 1

No although burning does result in a smaller delta G (free energy).
You want dG = dH - TdS.
A + B ==>
dG products - dG reactants < 0 for a reaction to occur spontaneously.

Answer 2

so the answer??

Answer 3

I would say A, it's not C or D for sure though.