PT 13 S2 Q20

Pretzels can cause cavities. Interestingly, the longer that a pretzel remains ... ...

The reasoning in the argument is vulnerable to criticism on the grounds that the argument
(A) treats a correlation that holds within individual categories as thereby holding across categories
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Flawed Reasoning: Intro Set