An election with no incumbent running is called __________

Scholars predict that ___________ will be the basis of the

majority of world violence. A) terrorism B) nation-based conflicts C) coups d'état D) class-based conflict

"Only high-constraint models of research can be scientific." Your textbook authors would argue that this statement is

A) false B) true C) true in scientific disciplines other than the natural sciences. D) false in the social sciences, but true in the natural sciences.