The United States refused to support popular elections in Vietnam in 1956 because they
O A. feared that the Soviet Union would take over if the elections went
against the Communists.
OB. had promised to give Vietnam back to the French.
O c. had promised South Korea that its elections would be held first.
O D. feared that Vietnam would vote for a Communist government.

here are some events that to cause increased conflict between the north and south

1) mexican cession- gaining modern day california, utah, arizona, and new mexico from mexico. caused southern and northern politicians to fight over whether or not there would be slavery in these newly acquired territories.

2) uncle tom's cabin- this famous book described the cruelty of slavery in the south during the antebellum period, causing more northerners to support abolition and southerners to resent the book as they felt it unfairly depicted southern society.

3) kansas- nebraska act- disagreements over whether or not kansas and nebraska would be free or slave states caused issues between northern and southern politicians in congress.

4) bleeding kansas- this fighting took place in kansas after congress allowed this territory to vote on whether or not they would have slavery. citizens were killed and buildings were destroyed during this fighting.

we need the answer choices to answer the question