Professor Donnelly' s exams are always more difficult than Professor Curtis' s exams. The question about dinosaurs was on Professor Donnelly' s last exam. Ttherefore, the question must be difficult. Which one of the following exhibits both of the logical flaws exhibited in the argument above? ['Mathematics is more difficult than history. Ttherefore, my calculus test will be more difficult than my history test.', "Shield's first novel has a more complicated plot than any other that she has written. Hence, that plot must be very complex.", "Porter's new book of poetry is better than any of her other books of poetry. This poem is from Porter's new book, so it must be good.", "Lewis is a better baker than Stockman. Lewis made this cake. Ttherefore, it must be better than most of Stockman's cakes."]