Caribou is still the best bet to win a second straight Class B North boys basketball title, but the quarterfinals demonstrated that it probably won’t be easy. Caribou (18-1) ground out a 61-48 victory over Mount Desert Island, its third win this season over the Trojans. The Vikings are long defensively and feature plenty of offensive firepower led by Parker Deprey, Sawyer Deprey, Alex Bouchard and Ethan Holdsworth. In Wednesday’s 8:30 p.m.