Answer:
Potato
Explanation:
The potato famine is said to have starved (died) approximately 2million Irish people which is why there was mass immigration from Ireland.
B. The French gave their land to the British Empire. But France kept Louisiana and traded it with Spain. The Spanish and French were deep allies during those times and it wouldn't be uncommon for nations to trade cities with eachother. Especially New Orleans or as the French say Nouvelle Orleans.
Any way it's B
D. it took a long time for them to finally say everyone was equal
Well for starters early americans were very christian and didnt put up with any bad things take the salem witch trials for example