Goodyear's Sales Were Negatively Affected by the Tariff on Chinese

Goodyear's sales were negatively affected by the tariff on Chinese tires because

A) Goodyear operates factories in China, and some of the tires produced there were exported to the United States and subject to the tariff.
B) China retaliated and imposed a tariff on Goodyear tires exported to China.
C) despite being a U.S. company, all of Goodyear's tires are produced in China.
D) the tariff raised the price on Chinese tires, allowing these tires to compete more directly with the more expensive Goodyear tires.