Which sentence uses correct punctuation and capitalization within parentheses?
A: My brother (He has read hundreds of books on the subject.) told me that the samurai lived by a strict code of honor.
B: My brother (He has read hundreds of books on the subject) told me that the samurai lived by a strict code of honor.
C: My brother (he has read hundreds of books on the subject) told me that the samurai lived by a strict code of honor.