Answer
A.
Work Step by Step
Spontaneous reactions move downhill in terms of free energy, from higher free energy in the reactants to lower free energy in the products, just as someone rolling downhill on a skateboard moves from higher gravitational potential energy at the top of the hill to lower gravitational potential energy at the bottom. B. is wrong since it is the opposite of this, and C. also contradicts A. in requiring energy to be added to get to the products. Further, entropy always increases, in contrast to what D. says.
