Final answer:
Sales taxes and income taxes are both examples of derived tax revenue since they represent income generated for the government not directly in exchange for goods or services but to support public expenses.
Step-by-step explanation:
Understanding Derived Tax Revenue
An example of a derived tax revenue is income that a government entity receives from taxes that are not directly related to any services or benefits provided to the taxpayers. Both sales taxes and income taxes represent derived tax revenues, as they are imposed on the general populace, not in exchange for any specific good or service but rather to fund the various public expenses and government functions. Therefore, the correct answer to the student's question, 'Which of the following would be an example of a derived tax revenue?' would be c. Both of the above.