How would a nation most likely try to limit inexpensive cars from being imported? by imposing sanctions against the country where the cars are made by imposing tariffs on the cars at the border by entering into a free trade agreement such as nafta by withholding aid from the country where the cars are made

Answer A and D are irrelevant.

Answer C is incorrect: the objective of free trade agreement such as NAFTA is to impulse exportation, import and investment.  

Last year China raised taxes on imported cars. The result is less than 5 percent of cars in China are imported, so answer B is the correct answer.

B: By imposing tariffs on the cars at the border

Explanation:

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.