The United Nations has been MOST successful in
A
ending civil wars
B
resolving disputes between the major powers

C
limiting the increase in the number and power of nuclear weapon
D
Ending fighting between small nations

The answer is d if you are on edgenuity. 

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

More like hurricane tortilla x

According to new research, more than 5..5 million deaths are associated with polluted air. hope this : ).