In paragraph 4, why does the author compare anaerobic digesters to stomachs? A) To show how the silos use bacteria to change the food waste into methane

B) To describe how cars use biofuel created by the silos

C) To emphasize that the silos produce the same amount of methane as landfills

D) To suggest that the food waste collected in silos comes mainly from left over meals

lmk if you need paragraph 4