B, the hook is to get the reader's attention.
Answer:
I think it's C) "It creates tension by moving fron the slower pace of the description to the faster pace of Bob's dialogue, which suggests an uneasiness on Bob's part."
Because even though I only read this part of the passage just now, instead of the full story, I can tell the description of either character, wasn't too detailed. Not to mention the pacing did start out normally, but it felt as though Bob chimed in a little too quickly.
I hope this answer satisfies you. Also please let me know if it's right or not :)
The thing in this story is that<span> her nice crackers became so famous in the neighborhood that many people were desirous of obtaining them. Because of numerous requests of this kind, she asked permission of her mistress to bake crackers at night, after all the household work was done; and she obtained leave to do it, provided she would clothe herself and her children from the profits. After proposing these terms, after working hard all day for her mistress, she began her midnight bakings, assisted by her two oldest children. </span>
Mrs. Germane praises Charlotte for her high test score.
The answer to your question is indeed adverb
