What is the purpose of the technique of positive imagination described in the text?

The purpose of the technique of positive imagination is to help manage anxiety and panic by modifying negative thoughts and mental images.
The purpose of the technique of positive imagination is to help increase physical changes in the body, such as salivation, through vivid imagination.
The purpose of the technique of positive imagination is to help induce sleep and relaxation through guided visualization.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and III are correct.
e) II and III are correct.