The correct answer for the question that is being presented above is this one: "a. Massachusetts." In Massachusetts colony was the first abolitionist group formed. It was in <span>1829 when David Walker, a freeman of color originally from the South, published An Appeal to the Colored Citizens of the World in Boston, Massachusetts.</span>
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.
The Air battle above the English Channel to prepare for an invasion of Britain is the best describes the Battle of Britain. it is famously known as the Air battle for England where Royal Air Force defends against the German Air Force which began at the end of June 1940. The British and German air forces clashed in the skies over the United Kingdom and the battle ended when the Germany failed to gain air superiority over the Royal air force despite months of targeting Britains air bases, military post and civilian population.