Since we're looking for a point of disagreement, strong wording doesn't necessarily rule out an answer choice.
(B) Dana would disagree with this based on her first sentence. Pat would agree with this. Since flexibility in working alone or with others is "invaluable" (stimulus), all children "should" (choice B) learn to adapt to different methods.
(E) Dana would agree with this. Pat might also agree with this. In saying "not always," he or she leaves open the possibility that it is sometimes desirable. If E stated that it is "always desirable," then Pat would disagree.