B. and E. marked the downfall of the Inca empire, for obvious reasons. Disease and civil war would obviously kill the empire, and taking an important leader would also mark great chaos within the empire. A. and C. are not to be ignored however, considering that maintaining peaceful relationships with the Spaniards only brought death and chaos to the Aztecs, all from the Spaniards.
A policy of neutrality.
Hope this helps : )
In the 1980's the Central American countries were entrenched with Civil War. The correct option among all the options that are given in the question is option "b".
NAFTA was signed by all of the following countries, except Cuba. The correct option among all the options that are given in the question is option "d".