If life were endless, the world would be full of

A．Some of the highest pesticide residues appear in meat and eggs.
B．A meatless diet does not provide enough nutrients.
C．Protein can be found in almost every food.
D．More than 80% of the com in the U. S. is fed to livestock.

A．believe that emotions are fundamental for them to stay alive
B．benefit flora rewards and punishments
C．know what is vital to progress of society
D．enjoy being rewarded for doing the right thing