In the following list identify these statements which are indicative of helping behavior of effective teaching. Select from the code to give your answer.

(a) Instructional variety marked by multiple devices used.

(b) Using the ideas of students while making presentations.

(c) Student’s success rate as evident in correctly understanding the assignments.

(d) Engagement in learning tasks.

(e) A teacher affects as manifest in relations with students.

(f) Probing to add and seek classifications of ideas.