One of the main sources of revenue for many states is

Aa poll tax placed on voter registrations.
Ba sales tax placed on goods and services.C.a duty on products exported from the state.D.a tariff on products imported from other states.

Verified Answer :

Hagrid

The correct answer for this question is "b. a sales tax placed on goods and services." One of the main sources of revenue for many states is a sales tax placed on goods and services. Revenue by definition refers to the income of a business coming from the sales of goods and services.