President reagan supported economics tax proposals. a. federal b. demand-side c. keynesian d. supply-side

I think the sentence is asking for a description of the type of economics, not the type of taxes. Answer D makes the most sense if you read it this way. "Supply-side economics" If you read it as "federal economics" that doesn't really make much sense. The federal government doesn't create our economy, it only regulates it. I recommend choosing D) as your best option.