What did the greeks believe about people? a. they needed a strong leader to guide them. b. they could run good governments. c. they were slaves to the gods. d. they needed to rely on the wealthy to choose leaders.

Choice A they needed a strong leader to guide them

Greece was a culination of many city states with different government systems. For example, Sparta was an oligarchy, and Athens was a democracy.
Personally, I think this is a strange question because it doesn't specify which Greek society or in what context they believed this. Try looking in your reading, it may take a different specific viewpoint on this. 
If I had to give an answer, I would choose, B. They could run good governments. The governments that existed Greece are known for being revolutionary new developments.