Heterotrophs Are Dependent on Autotrophs for Their Food Supply

Heterotrophs are dependent on autotrophs for their food supply.Autotrophs can make their own food by

A) feeding on bacteria and converting the nutrients into usable energy.
B) synthesizing it from water and CO₂.
C) using light and simple chemicals to make reduced carbon compounds.
D) consuming and metabolizing plant matter.
E) Both a and b