Answer:
Option C : China adds 25% to the cost of all cars imported into the country.
Step-by-step explanation:
Let us first define what Tariff means. Tariff means implementing a tax duty on a certain product so as to regulate its import or export.
From above information it is evident that option A and B are incorrect as its was a ban on import and duty addition. Similarly, option D is also not tariff but it falls into the category of quota as there is a limit on the import quantity. Hence, option C is correct as china added 25% as a duty on imports.