Until 1990, the results of the Reading Level Assessment Test (RLAT) given in middle schools of Brooklyn and Queens indicated that the reading ability of students in the two boroughs was nearly identical. Since 1990, however, the average score on the test has been markedly higher in Brooklyn than in Queens. The Superintendent of the Brooklyn schools believes that his students did better on the test because all Brooklyn middle schools reinstated minimum reading level requirements. Under these requirements, all students in Brooklyn reading below grade level are required to attend after-school reading workshops once a week.
If the statements above are true, which one of the following MUST also be true?
A. The average score on the RLAT in Brooklyn has increased the minimum reading level requirement.
B. There was a minimum reading level requirement in the Queens middle schools at some point before 1990.
C. There was no minimum reading level requirement in the Brooklyn middle schools at some point before 1990.
D. There was no minimum reading level requirement in the Queens middle schools at some point after 1990.
E. Since 1990, the RLAT score of every student in Brooklyn has been higher than the RLAT score of every student in Queens.