Answer:
Option B is correct.
Explanation:
Salt was needed to preserve food to keep it from going bad too soon.
Hoped this helped.
Answer:
A. My mother, a doctor, hopes that I follow her career path.
Explanation:
The subject my mother preceding the appositive provides sufficient identification on its own, so you need to use commas around the appositive a doctor.
Sorry, there's no passage to read from.