Read the following passage:

He sighed and looked about him. "This is no world for men," he said. "And yet in a way--it appeals."

He became silent for a time, then commenced his meditative humming.

In the excerpt above, the reader can infer that:

Mr. Cavor is upset that the moon is not like earth.
Mr. Cavor is a deeply religious man.
Mr. Cavor is feeling light-headed.
Mr. Cavor is thinking about staying on the moon.