A bag is the indefinite article so i would guess c
Correct me if I’m wrong but I don’t think so. Mysterious and scary are both adjectives so it should’ve gone: The book was mysterious, scary, and humorous. Then, (I think) that sentence would’ve been a parallel structure.
All of the programs are helpful in alleviating poverty because people don't have to pay for them. Nutrition programs give you food form the country just like housing and free healthcare are made to stop you from wasting your own money on it. All of the programs help people spend money on things that they need and are not for basic survival.