My personal opinion to what the answers are:
Readers are uneasy with the narrator's growing instability,
Readers question the narrator's ability to act rationally,
Readers understand that the account given by the narrator is true.
I hope this helped, again, this is only my opinion to what I believe the answers are.
Answer:
I think all of the above because without all of them your essay wouldn't make sense
This is a sentence, it is complete.
Reynaldo likes to play the trumpet; as a result, he joined the school band.