Research Examining the Incidence of Sexism in the Classroom Indicates

Research examining the incidence of sexism in the classroom indicates that

A) there is evidence to support the stereotype that girls talk more in school than do boys.
B) teachers give more active teaching attention to girls in math and science to encourage female interest in these subjects.
C) teachers accept calling out in class by girls more so than boys.
D) teachers were generally unaware they were treating girls and boys differently until they saw themselves on video.