Which of the following best describes the relationship between the countries of the Allied Powers?

A
Serbia, Japan and Romania were the Allied Powers who fought against one another.

B
The Allied Powers of France, Britain and Russia agreed to help each other fight if one of them was attacked.

C
The Allied Powers of Austria-Hungary and Greece fought together against the Ottoman Empire.

D
Germany, Austria-Hungary and Italy were the Allied Powers who agreed to help each other fight if one of them was attacked.

B

The Allied Powers of France, Britain and Russia agreed to help each other fight if one of them was attacked.

Explanation:

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.