Final answer:
If a member only redeems $22 of his or her $25 reward, the balance generally remains in the member's account.
Step-by-step explanation:
If a member only redeems $22 of his or her $25 reward, the balance generally remains in the member's account. This means that the answer would be b) It is added to the member's account. The unused balance can be saved for future purchases or transactions. For example, if the member decides to make another purchase or redeem more rewards in the future, the remaining $3 can be applied towards that.