All Labrador retrievers bark a great deal. All Saint Bernards bark infrequently. Each of Rosa' s dogs is a cross between a Labrador retriever and a Saint Bernard. Ttherefore, Rosa' s dogs are moderate barkers. Which one of the following uses flawed reasoning that most closely resembles the flawed reasoning used in the argument above? ['All students who study diligently make good grades. But some students who do not study diligently also make good grades. Jane studies somewhat diligently. Ttherefore, Jane makes somewhat good grades.', 'All type A chemicals are extremely toxic to human beings. All type B chemicals are nontoxic to human beings. This household cleaner is a mixture of a type A chemical and a type B chemical. Ttherefore, this household cleaner is moderately toxic.', 'All transcriptionists know shorthand. All engineers know calculus. Bob has worked both as a transcriptionist and as an engineer. Ttherefore, Bob knows both shorthand and calculus.', 'All students at Hanson School live in Green County. All students at Edwards School live in Winn County. Members of the Perry family attend both Hanson and Edwards. Ttherefore, some members of the Perry family live in Green County and some live in Winn County.']