(Watch the video 5:46-9:45) The teacher presented the task with slides and key words in different colors. What could be the possible reasons for the teacher to do such integration? <br/> A、She may want to draw students' attention.<br/> B、She may want to arouse students' interest.<br/> C、She may want to increase the difficulty level of the task.<br/> D、She may want to reduce the difficulty level of the task.