Answer:
B) Sheree's grandmother—a country woman through and through—knew how to bake a serious pie.
Explanation:
A dash (-) is often used to clearly define an independent clause. The dash is used to separate two words that have been connected together, as in peach and blue. Where there should be no pause between the sentences.
The correct option is B: new, overwhelming.
Adjectives are usually used to modify nouns. In this case, in the sentence "[although] the new students worked hard, they could barely keep up with the overwhelming amount of homework", "new" modifies "students" and "overwhelming" modifies "amount of homework".
The other options contain "barely" which is an adverb, not an adjective. Moreover, "hard" is also used as an adverb in the sentence. Adverbs such as "barely" modify a verb. That is to say, they add information about HOW an action is.