I would say D, but only sure 90%.
Answer:
The dog harrowed the poor cat before it hissed and left the room
I would say the correct answer would be Alex is his brother since the way the statement is worded, first it talks of his sister, then of his brother Jerry and next his sibling, Alex so since it comes right after the mention of his brother Jerry I would think Alex would be a brother though I can't prove it .
A. protagonist. A protagonist is a prominent character ( or main character ) in a fictional literary context.
WW1 and WW2, these both were very impacting wars