An arrhenius base is a substance that increases the concentration of which ion in water solution?

An Arrhenius base is a substance that increases the concentration of OH- ions in a water solution.

A base has a high pH, whereas an acid has a low pH and increases the concentration of H+ ions in a solution.

Hope this helps!

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.