With no explanation, chose the best option from "A" or "B". John is told that he did not meet the requirements for promotion by his manager, Bill. John wants to react to the bad news.

A: John tells his boss that he's biased and the reason for the lack of promotion is that the whole system is corrupt.
B: John tells Bill that he simply has to try harder and vows to improve his skills and performance for next time.
B.