Final answer:
The accounting treatment for Rebecca's payment for future hair appointments on January 15 is a Liability, which represents an obligation until the services are provided. So, the correct answer is: b. Liability
Step-by-step explanation:
The accounting treatment for Rebecca's payment of $500 for future hair appointments on January 15 would be classified as a Liability.
This is because the payment represents an obligation that Rebecca has to provide services in the future. Until the services are actually provided, the payment is considered a liability on the balance sheet.
Once the hair appointments are completed, the liability would be reduced and an Expense would be recognized as the cost of providing the services.