Judging from the Textbook's Discussion of Educational Research, Which One

Judging from the textbook's discussion of educational research, which one of the following would be the best course of action for teachers to take?

A) Teachers shouldn't take research findings very seriously, because there are too many "holes" in what we know from research.
B) Teachers should focus on research that relates to a single theoretical perspective such as Piaget's theory or information processing theory) .
C) Teachers can use findings from educational research to guide their classroom decision making.
D) Teachers should always go with their common sense and "gut" feelings about how to teach, regardless of any research findings to the contrary.