Answer: option 'a'= Ivey et al.
Explanation:
The book '' Theories of Counseling and Psychotherapy: A Multicultural Perspective'' was written by, Allen E. Ivey(a Professor at the University of Massachusetts, Amherst), Michael D'Andrea, Mary Bradford Ivey, and Lynn Simek-Morgan( that is, Ivey et al).
====> The book is a great counseling book that talks a lot about multicultural issues, Family counseling and therapy, feminism and so on. The book teaches the theories relating to counseling and its Psychology.
Ivey et al introduced the attending behavior concepts to the helping field.
