What effect did the Louisiana Purchase have on the United States? O A. It resulted in the nation going bankrupt.
O B. It led to a peace treaty between the United States and Great
Britain.
O C. It caused the nation to enter into a war with France.
O D. It doubled the size of the nation.

D. It doubled the size of the nation.

Explanation:

The Louisiana Purchase eventually doubled the size of the United States, greatly strengthened the country materially and strategically.

answer; i believe the correct answer is ( quakers);

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: