Language experts conducted an experiment to judge the effect of reading books on the writing abilities of children. In the first phase of the experiment, children from a private school were asked to read excerpts from three classic books before they were asked to write an essay on their mother. It was found that 39% of these children were able to present a good opening and closing, and use good vocabulary. In the second phase of the experiment, children in the same age group from a public school were asked to read excerpts from three contemporary books. Now, only 18% of the children were able to present a good opening and closing, and use good vocabulary. The experts concluded that children are more likely to get influenced by reading books when they read classics than when they read contemporary work.
Which one of the following, if true, would most seriously weaken the experts' conclusion?
a. Children studying in private schools generally have similar command over reading and writing English as those studying in public schools have.
b. In the second phase, the children were the toppers of their school.
c. The first group consisted of children with Math as their favorite subject while the second group consisted of children with English as their favorite subject.
d. In the second phase, 37% of the children were found skipping a large part of their reading material. This percentage was 65% in the first phase.
e. The percentage of children known to have a flair for reading and writing English was higher in the first phase than in the second phase.