I think that Captain Renault didn't arrest Rick because he trusts Rick and what Rick is doing. He thinks Rick is a smart person and that his judgement is good. I also think he didn't arrest Rick because he is loyal. The film shows many different competing and conflicting motivations in the characters.
I’m guessing it wants you to fill in two major key signatures like D major and C major also with two minor key signatures like A minor and B minor. I picked those key signatures because A minor is the same as C major but it starts on A and D major and B minor is the same but it starts on B
