I know it’s a or b but idk which

it's b

Explanation:

because the closer you get to the center of the earth the hotter  it gets.

answer: glucoamylase presented optimum activity at temperature of 55â°c, and, in the glycosidic bonds from the non-reducing ends of starch, resulting in the production of glucose. source and type of fermentation can affect the enzyme's properties

credit to kalahira

i believe the answer would be b. hope it : )