If the federal government passed a law that did not provide money to state and local governments
But required them to construct wheelchair lifts at all train stations,it would be an example of

A) a regressive tax.
B) a progressive tax.
C) an unfunded mandate.
D) a block grant.

An unfunded mandate is a requirement placed on state and local governments by the federal government, but without providing the necessary funding to implement the requirement. In this case, the requirement to construct wheelchair lifts at all train stations would be an example of an unfunded mandate, as it would impose a financial burden on state and local governments without providing any financial assistance. Neither a regressive tax nor a progressive tax is relevant to this scenario, as it does not involve taxation. A block grant is a type of funding provided by the federal government to state and local governments for a specific purpose, and therefore is not applicable to this example.