We Can Assume That the Priestly Writer Wrote His Portions

We can assume that the Priestly writer wrote his portions of Genesis after the Babylonian Captivity of the Jews because _______________________________________________________________.

A) his work is dated 538 B.C.E., which is after the time the Jews spent in Babylon
B) he says so
C) he refers to God by the Hebrew word "Elohim"
D) he is often concerned with refuting the beliefs of the Babylonian religion