Also, c) doesn't prompt "tired" as an answer. When you ask someone "What is/was he like?" they normally answer "He's very nice/friendly/horrible/rude" etc. It wouldn't be answered with "He's tired". That might be the response to "How is he?" (as you have put in the very first question).
There are only two statements about the man's condition yet you have asked three questions. I'm not sure what answers you were trying to elicit from the three questions.
My suggestions would be perhaps:
a) How did the temperature affect the man?
(It made him cold.)
a) Was the man affected by the temperature?
(Yes, he was cold.)
b) Was he lively and energetic? (Yes/No and give further information)
(No, he was very, very tired.)
c) Do you think he was happy? (Extrapolate information)
No, I don't think he was happy.