which of these is a positive incentive for domestic producers?\n○ a subsidy on imported cars\n○ a tariff on…

Brief Explanations:

A subsidy on domestic oranges directly benefits domestic producers by reducing their costs or increasing their income. A subsidy on imported cars helps importers, not domestic producers. Tariffs on cars or clothes increase the cost of imported goods but don't directly give a positive incentive like a subsidy does to domestic producers of those specific goods.

Answer:

C. a subsidy on domestic oranges