Which of the following correctly integrates a quotation inside of a quotation?
A. Thoreau writes, 'At one o'clock the next day Massassolt "brought two fishes that he had shot," about thrice as big a bream.'
B. Thoreau writes, "At one o'clock the next day Massassoit "brought two fishes that he had shot," about thrice as big a bream."
C. Thoreau writes, "At one o'clock the next day Massassolt 'brought two fishes that he had shot,' about thrice as big a bream."