When a client accumulates tokens without exchanging them it indicates that the tokens are losing their conditioned reinforcing value Tokens derive their value from being consistently paired with strong backup reinforcers If the client is not motivated to exchange the tokens it often means the available backup reinforcers are not sufficiently reinforcing or varied enough to sustain motivation Therefore increasing the variety andor desirability of the backup reinforcers available for exchange is the most appropriate first step This intervention aims to strengthen the pairing between the tokens and potent reinforcers making the act of earning and exchanging tokens more reinforcing Changing the entire token economy Option A is a drastic step and likely unnecessary if the core problem is related to the backup reinforcers Decreasing the number of items Option B would further reduce opportunities for exchange and likely exacerbate the problem Decreasing the value of stars Option C meaning items would cost fewer stars might seem appealing but if the items themselves are not desirable making them cheaper wont solve the core issue of motivation for the backup reinforcers The text specifically mentions increase the number of items the client which aligns with increasing variety and desirability to encourage spending