"The Complexities and Processes of Racial Housing Discrimination" by Vincent

"The Complexities and Processes of Racial Housing Discrimination" by Vincent J. Roscigno, Diana L. Karafin, and Griff Tester
Roscigno, Karafin, and Tester explore the dynamics of discrimination in the housing market. Their approach is unusually broad in two ways: 1) they focus on both "exclusionary" and "non-exclusionary practices, and 2) they utilize both quantitative and qualitative analytic techniques to meaningfully discuss the causal mechanisms that underlie discrimination in the housing market. Their approach sheds light on the wide range of causes of discrimination that appear to disproportionately handicap African American women.
-What has been a noticeable limitation in previous research on housing discrimination?

A) Failure to identify rates of discrimination
B) Failure to conduct audit studies
C) Failure to identify causal mechanisms that drive discrimination
D) Failure to study a subject matter, discrimination, that was not believed to exist.