Answer:
e) accounts receivable
Explanation:
a) allowance for doubtful accounts: this is used to determinate a provision of uncollectible account. Customers that will not honor their debts.
b)prepaid expenses: This is use for the payment in advance for utilities and other expenses like rent. The description does not involve any payment from Dr Torres.
c)unearned revenues: used when the customer pays the service or goods but the business didn't perform or deliver. The Dr has perform his services so they revenues are earned.
d) intangible assets: refers to trademarks, patents and other assets which related to the business. the customers account are tangible, they are a know value
e) accounts receivable: correct.
This represent the collectible amount from customers, which is exactly what it is happening. The Dr gives a certain amount of time to receive the payment for his services. While the services aren't paid, the Dr has "Accounts to receive"