Which of the Following Is Explained Well by the Specific-Factor

Which of the following is explained well by the specific-factor approach (Ricardo-Viner model) ?

A) Steel workers and steel factory owners both lobby for tariffs on imported steel.
B) Steel workers and agricultural workers join together to oppose tariffs.
C) Owners of factories in a country with abundant fertile land promote free trade.
D) Car manufacturers and owners of megafarms collude in lobbying for tariffs on car and wheat imports.
E) Workers in an automobile factory promote free trade while the factory owners lobby for tariffs on imported cars.