A:
Making the lesson interesting
B:
Making the lesson effective
C:
Having more time to relax during the teaching
D:
Solving the personal problems of the students
Explanation
The use of audio-visual aids helps the teacher in B) Making the lesson effective.
Audio-visual aids, such as visual presentations, videos, or multimedia resources, can enhance the effectiveness of teaching by making the lesson more engaging, interactive, and memorable. These aids help in presenting information in a visual or auditory format, which can improve understanding, retention, and overall comprehension for students. While audio-visual aids can make the lesson more interesting and engaging, their primary purpose is to enhance the effectiveness of teaching and improve the learning outcomes for students.