What Does It Mean to Consider the "Teacher as Researcher

What does it mean to consider the "teacher as researcher"?

A) To be a good teacher means you should be conducting studies and publishing results.
B) Teachers actively explore current research and innovations in teaching, as well as carefully observe children, to enhance their own practice.
C) Teachers should refrain from interacting with their children so they can obtain unbiased observation data.
D) Teachers must take detailed notes for most of their time in the classroom to ensure correct data recording.