nmovant has the burden to allege and prove such jurisdiction. bane v. David P. Jacobson & Co., Ltd, 880 F.Supp. 1091, 1094 (E.D.Va. 1995) (citing Adams v. Bain, 697 F.2d 1213, 1219 (4th Cir.1982)). "A court asked to dismiss for lack of jurisdiction may re- solve factual disputes to determine the proper di