I would say Andrew Johnson he was the president during that time. meaning he was the president when the 14th admindment was made (14 admindment made everyone born human a citizen and wpuld be treated equally)
The best option from the list would be that "A. <span>The U.S. purchased the Florida Territory from Spain and seven states were admitted into the union, since this was one of the few times that the US purchased land instead of taking it through force. </span>
