Which of the Following Defines Prepaid Expenses

Which of the following defines prepaid expenses?

A) Stocks and bonds that a business may hold in the hope that they would provide a greater return to the business rather than just letting cash "sit" in a bank account.
B) The amount of money due to a business from prior credit sales.
C) A formal debt instrument that will be paid to the company within a year.
D) An accrual accounting term that represents payments made in advance of their actual occurrence.
E) Tangible goods held by a business for the production of goods and services.