I am pretty sure that it is c Research shows that no one style is always more effective.
The correct answer is B.
BECAUSE:
Comma's always come after an interjection, and they always stand for a pause.
So:
Oh, Kelly, (...) may I borrow your green dress tomorrow?
Hope this helps.
Food,water,phone,bible,books,cards,rollerskates.surfboard,axe,and water purifier.
Reasonable guess (4th option)
I believe the answer would be D.