ia'hihich of the following statements would you prove by the indirect me'iod? I. In triangle ABC, if :rnLA'P miE, then AC 9'5 BC. II. If alternate exterior ill: alternate exterior LB, then H is not parallel to m. Ill. It' {x+ 2}{x+ 3} =1], thenx= 2or:r= 3. IV. If two sides of a triangle are congruent, then the two angles opposite these sides are also congruent. U. The perpendicular hisector of a line segment is unique. a} II, and if only h] I, II, and if only c} None e) I only