Which of the Following Food Chains Will Allow the Most $\rarr$

Multiple Choice

Which of the following food chains will allow the most energy to be available for human use?

A) corn $\rarr$ cow $\rarr$ humans
B) corn $\rarr$ humans
C) algae $\rarr$ minnows $\rarr$ fish $\rarr$ humans
D) alfalfa $\rarr$ cow $\rarr$ milk $\rarr$ humans
E) corn $\rarr$ hen $\rarr$ eggs $\rarr$ humans