Which of the Following Factors Tends to Most Significantly Impact

Multiple Choice

Which of the following factors tends to most significantly impact a teacher's ability to incorporate the mathematical processes and practices in the classroom?

A) The teacher's mathematics content background.
B) The ability level of students in the class.
C) The textbook used to teach the class.
D) The type of homework problems assigned to students.
E) The teacher's understanding of child psychology.