The Main Thing That Seemed to Slow Down the Wars

The main thing that seemed to slow down the wars for power in the sixth and seventh centuries was ______________.

A) the designation of a church official to crown the next ruler
B) the negotiation among all the potential candidates for collective rule
C) the designation of a castle or town as the focal point for rule
D) the treaty agreeing to specific titles in specific areas
E) none of these; nothing slowed down warfare in that period