A benefit of being an employee paid commission is option B.) “Excellent job performance is rewarded with higher pay.”
The Oxford Dictionary quotes that the denotation of a commission is “an amount of money, typically a set percentage of the value involved, paid to an agent in a commercial transaction.” When an employee is paid commission, it often is because he or she has worked hard, done extra work, or simply had excellent job performance.
Hence, option B is a benefit of being an employee paid commission.