Which of the following statements best characterizes the differences between monotheism, polytheism, and animism? a. monotheism refers to a belief in one god, while the other two types of religions do not involve a belief in any gods. b. monotheism refers to a belief in one god, while the other two types of religions always involve a belief in multiple gods. c. monotheism refers to a belief in one god, polytheism refers to a belief in multiple gods, and animism refers to a belief in the spiritual power of nature. d. monotheism refers to a belief in many gods, while polytheism and animism always refer to belief in one god.