Which of the Following Is NOT a Finding of Research

Which of the following is NOT a finding of research examining the effects of class size on educational achievement?

A) Schools with smaller class sizes benefit students more than schools with larger classes.
B) Class size in elementary school does not predict educational achievement as long as the classroom is composed of students of the same intelligence levels.
C) Students who have been in small classes are less likely to have discipline problems when they are subsequently placed in regular-sized classes.
D) Short-term and long-term benefits of smaller classrooms are stronger for minority and low-income students.