Increasing the of a reactant exposes more of it to the reaction taking place.
a. catalyst
b. surface area
c. concentration
d. heat

I would go with B as more of the reactant is exposed per mol. A catalyst provides and alternate reaction path that reduces the activation energy but not necessarily exposes more of the reactant. Increasing the concentration wont increase the amount of exposed area nor will increasing the tempurature.

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.

Olá. porque a reação na temperatura é muito rapida a do copo : )