The correct answer is A. Belief in more than one god.
Step-by-step explanation
Polytheism is a religious conception that consists in the existence of more than one God. These religions generally associate each God with a natural phenomenon such as rain, drought, sun, moon, tide, among others. Early societies and civilizations were mainly polytheists for example in Egypt there were a lot of Gods such as Amon, Ra, Osiris, Horus, among others. the same occurs in the Greco-Roman religion with gods as Zeus/Jupiter, Poseidon/Neptune, Hades/Pluton, among others. So, the correct answer is A. Belief in more than one God.