An Education Researcher Studying First Graders Observes That Girls Are

An education researcher studying first graders observes that girls are much more likely to get the teacher's attention if they stay close to the teacher rather than moving to the other side of the classroom. By contrast, the researcher observes that boys get attention from the teacher regardless of their proximity to the teacher. The resulting message students receive in the classroom would be an example of:

A) the hidden curriculum.
B) gender proximity.
C) tracking.
D) between-school effects.