They would look in the index for mentions of the subject.
what do i have to read in order to answer i cant sort things out if you dont have the text for me to read
Answer: I don't know of the book you read, but..
Authors use historical times and revise them in such a way it's believable, immersive, and informative. They make sure their use of history isn't changed into an outlandish fashion to fit the time it's set in. They usually do this because you can't go back in history and show them what happened, so you must create a fictional yet historical piece to preserve the time.
A. Uses the vocab word incorrectly. ‘Exploit’ means to take advantage of which does not make sense in the context of the sentence (the correct word for that sentence is probably ‘explosion’).
B. Is correct because ‘esteem’ means to hold respect for.