III undermines the claim for sure. The ad says size is directly proportional to flavor (content). As mentioned in III, if Crunch-o, despite its size, has 50% less content, it calls into question the above relationship.
III is only in D and E
I says that despite the size of individual cookie is large for Crunch-o, number of Choc-o is more in one packet. This compensates the additional flavor in Crunch-o's each cookie. Hence, the conclusion that flavor of both cookies per pack is same. This undermines the claim.
I and III is only present in E.












