To modify undesirable behavior of the student, the most effective method is , To modify undesirable behavior of the student, the most effective method is

Solution

D. to find out the causes of undesirable behavior and suggest remedies

Explanation

To modify undesirable behavior of the student, the most effective method is to find out the causes of undesirable behavior and suggest remedies. After finding the causes of that behavior one can easily work on it and suggest some remedies to modify that behavior.