Although City International School has provided qualified teachers and a revamped curriculum for the last three years, the social science and geography scores for grade X students have failed to reach the expected levels. Therefore, the parents have recommended to the principal that the text-heavy subjects such as social science and geography be taught in their native language instead of in English. The recommendation of the parents is flawed because they failed to consider whether .
A. the undesirable outcome is an exception
B. only one cause led to the undesirable outcome
C. the irrelevant recommendation will address the concern
D. only one cause led to many undesirable outcomes
E. many causes led to many undesirable outcomes