Abe most likely said that, because if he said slavery was wrong at the time people would disagree and go against him which is very sad but true.
A. Spanish conquistadors bring their horses with them across the Atlantic. Some horses escape or swim to shore after a ship sinks. The Plains Indians become expert horsemen and buffalo hunters.
This was certainly not intentional since hardly the conquistadors would want their enemies to be stronger.
B. B. Rats are aboard European ships coming to the Americas. The rats spread disease and hunt unknown numbers of smaller animals to extinction.
This is hardly intentional. Rats were almost unavoidable back then and the Europeans just did not care much about them. They weren't thinking about how the rats would cause trouble in the Americas. They were "just rats".
So the only intentional one is:
C. Columbus brought pigs to the Americas on his second voyage. The pigs provided a valuable source of food for a growing population.
Columbus brought pigs for them to serve as food eventually and so they did.
There are many oceans you could name for this but if it isn’t looking for a specific answer just put - Pacific
It could be argued that President Jefferson's top priority in his agenda was "<span>C) his foreign policy", since be was a believer that the Executive Branch so stay as far out of domestic issues as possible.</span>