Answer:
b.
"I don't care what you say about my name," P.T. Barnum always said, "just spell my name right."
Explanation:
It's b because "I don't care what you say about my name, just spell my name right." is a full sentence. It is just interrupted by 'P.T Barnum always said'. Because it is interrupted, you don't have to capitalize the letter J.
