The overall change in enthalpy of a reaction depends only on

The choices can be found elsewhere and as follows:

A. the reactants and the products. 
B. the path that is taken from the reactants to the products. 
C. the reactants and the catalysts only. 
D. the reactants, the products, and the catalysts.

I believe the correct answer is option A. The overall change in enthalpy of a reaction depends only on the reactants and the products. Hope this answers the question. Have a nice day.

It's most natural state has a charge of -2. So, a negative ion with two more electrons than is normal.