Question

the united states was part of the conflict in bosnia during clintons presidency. as a result of international involvement,
bosnias ethnic relations grew worse.
serbia signed a peace agreement.
serbia refused to accept terms of peace.
bosnias muslim population returned.

Explanation:

During the Bosnian conflict with international involvement including the US, the Dayton Agreement was reached. This led to Serbia (among other parties) signing a peace - agreement to end the war. Ethnic relations did not grow worse as a positive outcome of international efforts, Serbia did not refuse peace terms as it signed the agreement, and the return of Bosnia's Muslim population was not a direct result of international involvement in terms of signing a peace - related outcome.

Answer:

Serbia signed a peace agreement.