Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) American voters are getting wise to Donald Trump's radical protectionist fantasies. As the primaries swing toward the Northeast, a region even more dependent on trade than Wisconsin, serious economic and foreign policy issues will continue to plague the Republican front-runner. Let's start with Trump's now infamous pledge to erect a giant (and in his words, "beautiful") wall on the Mexican border -- and to make Mexico pay for it. The plan betrays total ignorance as to the real dynamics between our continental neighbors and how they benefit America. Perhaps he doesn't realize that Mexican migration to America is now net neutral: As many Mexicans are going back to Mexico's growing economy as coming to work in the United States. We will miss them when they're gone, and so should Trump.Parag Khanna: A businessman should at the very least understand the most basic law of economicsMaybe Donald Trump should go and see the reality on the ground around where he would erect his wall, he says 
 Question:This is why imposing stiff tariffs on _ imports would be so counterproductive.

Mexican