If the sentence in question is a statement (ends with a period), I would probably "however" as your transition word.
Think the answer is connecting clues to background knowledge.When you have enough back knowledge to whatever you’re reading so far you’re able to make a prediction to what will happen next.
He goes to jail because he stole the money from the bank, or he gets away with it.
The answer is: Except for A) Researching the background of the author.
It is not necessary for you to know the background of the author for you to comprehend a memoir.