The number of Lariat High School students found in possession of fake driver’s licenses has increased considerably this year over last year. Because a similar increase did not occur at neighboring Independence High School, it is likely the case that the students at Lariat High School have easier access to fake driver’s licenses than do the students at Independence High School.
Which of the following, if true, would cast the most serious doubt on the explanation for the increase given above?
(A) Many students at Lariat High School who were caught with fake driver’s licenses were also caught with fake driver’s licenses last year.
(B) The number of students at Lariat High School did not change significantly between last year and this year.
(C) Many Independence High School students had driver’s licenses confiscated last year.
(D) This year, the driver’s licenses confiscated at Independence High School were of lower quality than those at Lariat High School.
(E) A large percentage of Lariat High School students who were caught with fake driver’s licenses this year were transfer students from Independence High School.