What Is True of the Amino Acids That Might Have

What is true of the amino acids that might have been delivered to Earth within carbonaceous chondrites?

A) They had the same proportion of L and D isomers as Earth does today.
B) Their abundance would have been dramatically reduced upon passage through early Earth's oxidizing atmosphere.
C) There were more kinds of amino acids on the chondrites than are found in living organisms today.
D) They were delivered in the form of polypeptides.