D.  Although they were immortal, they had many characteristics of humans.
Explanation:
- The main feature of the Greek religion was that the gods were represented as men with all their faults and virtues. 
- Religion deeply permeated all aspects of their private and public life. Initially, during the ancestral relations, the Greek religion consisted in the worship of natural phenomena - animals, earth, trees. 
- After the breakup, in Homeric times this religion was replaced by a belief in gods. 
- The Greeks created many gods, which they imagined in human form. 
- These gods also had a human nature, were all-powerful and immortal. Greek mythology must have influenced all other mythologies.
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