the answers are
B) The belligerent countries at last decided to sign a peace treaty.
C)The belligerent girl talked back to a teacher. &
E) The United Nations sent a diplomat to the belligerent country.
in other words
2) The belligerent countries at last decided to sign a peace treaty.
3) The belligerent girl talked back to a teacher.
5) he United Nations sent a diplomat to the belligerent country.