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 orange - producers by reducing their costs or increasing their revenue. A subsidy on imported cars helps foreign producers, a tariff on cars affects car - related producers in general terms and may not be a direct positive for domestic producers compared to a domestic subsidy, and a tariff on clothes is not related to the producers of the question's context (domestic producers in general with an example of oranges).

Answer:

a subsidy on domestic oranges