Class B North Dakota’s defending champion flexed its muscle in Wahpeton, edging Minnesota power Frazee for the Wahpeton Dan Unruh team title 242-227.5.  The Broncos won the team title on the strength of titles from Hunter Schwab (145), Jordan Sours (152), Avery Dick (170), and Ben Shearer (285). Grand Forks Central was third with 185…