The correct answer is B) Columbus brought pigs to the Americas on his second voyage. the pigs provided a valuable source of food for a growing population.
The intentional consequence is "Columbus brought pigs to the Americas on his second voyage. the pigs provided a valuable source of food for a growing population."
Intentional consequences are the by-product of conscious decisions. Unintentional consequences are the outcomes that were not foreseen, but they appeared as a result of some actions. In this case, when Columbus brought pigs to the Americas on his second voyage. the pigs provided a valuable source of food for a growing population. So Colombus was conscious that the fact of bringing these animals would represent a benefit for his people.