Answer:
B. By copying many pieces of Greek art
Step-by-step explanation:
It is not A, because Christianity is not a Greek religion. It actually find it's roots in the province of Judea, in which the main show of the religion, Jesus, had traveled and taught in.
It is not C, because the Greek religion is not monotheist. They believed that there was a god for individual things, with Zeus being the "head". This means that it is a polytheist religion.
I do not think it is D, because Greeks have used slavery before, though it may differ from city-state to city-state. However, slavery did play a role in Greek culture.