University of Wisconsin athletic director Barry Alvarez understands the public would like some answers about Big Ten expansion. Just donâ??t ask him. Alvarez said the decision rests with school presidents, not with the leagueâ??s athletic directors. Still, expansion was the hot-button topic Monday as conference coaches and administrators gathered in Chicago for three days of meetings. “People want to know whatâ??s going on, but nobody has any answers for them,” Alvarez said. “None of us do, anyway.”