Why Have Sociologists,at Times,been Critical of Jonathan Kozol's Findings on Public

Why have sociologists,at times,been critical of Jonathan Kozol's findings on public schools in his work Savage Inequalities?

A) because schools are not integral to the functioning of society and are, therefore, not worthy of empirical study
B) because young students cannot be trusted as respondents for sociological studies
C) because poor students are likely to lie about their educational experiences in order to fit into normative constructions of what it means to be educated
D) because he had no systematic way in which he chose the schools he studied, which allowed for selection bias
E) because Kozol's study focused too much on wealth disparity in education