Courage is a virtue seems like the answer, but I haven’t read the book. Though, I’m making an education guess because it takes courage to go to the moon.
The correct answer is,whom
The correct answer is:
a.
Run on
The given sentence is
an example of a run on sentence which is also known as a “fused sentence”. It has
two parts wherein either part can stand alone without the other. But instead of
being connected properly, they have been pieced together inaccurately and could
still be improved.