2. While there has always been tension between Mexico and the United States, one issue that has gained major prominence since the 1980's is:
(A) The illicit narcotics trade.
(B) Intellectual property theft.
(C)
Nuclear weapons.
(D) Environmental damage done by Mexican factories.
(E) Reparations for the Mexican-American War

E

Explanation:

because USA declined to incorporate with the union, due to political interests of the northern which were against the addition of new slave state. Thus, the Mexican government also encouraged for boarder Raids and the warnings for any attempts of annexation that would lead to have a war.

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explanation:

b) the confederacy had to pay all union war expenses.