What Is True About Academic Studies and Academic Views of Race

What is true about academic studies and academic views of race in the 1920s?

A) Many scholars and writers were beginning to denounce ideas of white supremacy.
B) Scholars published books warning that immigrants and people of color were "diluting" the white race.
C) Many academic reports were beginning to accept that blacks and whites were equal.
D) Academic studies tended to avoid controversy during the 1920s, especially regarding issues of race.