Research Supports That the Best Way to Cultivate Positive Dispositions

Research supports that the best way to cultivate positive dispositions toward mathematics in students is which of the following?

A) Have frequent discussions with students about the importance of viewing mathematics positively.
B) Feature regular guest speakers to address the need for mathematics in our society.
C) Use cooperative learning strategies in the classroom to boost morale and help students to view mathematics positively.
D) Model positive dispositions while teaching, since students will pick up on the ways that teachers act.
E) All of these are strongly supported by research.