By definition, a vitamin is all of the following except:
a. indispensable to body function
b. a caloric nutrient
c. required to prevent deficiency diseases
d. an organic compound
e. required in minute quantities

Fats and Carbohydrates are caloric nutrients, not vitamin

The answer is B.

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!