Answer:
B. Bosnia
Step-by-step explanation:
During the 1990's, what was once Yugoslavia fell apart, and multiple small nations formed from it. The nationalists in the Balkans did not wanted that as they had territorial aspirations, which was mostly noticeable at the Serbians. The Serbians wanted to gain control of what was once Yugoslavia, and they attacked initially Slovenia, and then Bosnia and Croatia. It soon become a very bloody war, where the religious and ethnic hatred resulted in a genocide. The international community intervened with military force, and the US was heavily involved in it. President Clinton was in charge in the US at that time and it was under his command that the US forces invaded Bosnia and stopped the conflict. Ever since then, there's international military forces in Bosnia in order to prevent any conflict, and the country is divided by religion and ethnicity into three internal parts.