Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?

A:Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

B:Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

C:Photosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.

D:Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.