Research on Flipped Classrooms Suggests That Student Performance Only Tends

Research on flipped classrooms suggests that student performance only tends to improve under which of the following conditions?

A) The teacher only occasionally uses the flipped approach.se only.
B) Students are highly motivated to learn independently.
C) The students are involved in making the learning videos.
D) The teacher also plans for how to increase the focus on conceptual understanding.
E) The content area under study is either number or geometry.