The answer is in the text.
Abraham Lincoln won the presidency in 1860 because the pro slavery vote was split between several candidates. He ran against three others. They were Northern Democrat Stephen Douglas, Southern Democrat John C. Breckenridge and Constitutional Union candidate John Bell. Lincoln was the only Republican and the first to win a presidential election.
The Manhattan project is when they were building nuclear weapons for wwii
Pull factors is what brought them to America. Push factors is what made them leave
the correct answer would be A- Henry refused to appoint Becket as archbishop of England. hope this helps!!