The correct answer would be D.
I believe that the closest synonym for the word overwhelmed is awestruck. It isn't jubilant, because that means happy. And overwhelmed isn't necessarily happy, it is just a strong emotion. Flattered and gracious just don't fit here.
The incorrectly punctuated sentences are the following:
1. The sentence: She wants to buy film, and chewing gum. = When listing only two items, it is not necessary to put a comma before the word "and".
2. The sentence: Around the collar are tiny white pearls. = The adjectives tiny and white should be separated by a comma.
Commitment is a great quality in the young.