Carena Has a Bad Habit of Biting Her Fingernails and Pulling

Multiple Choice

Carena has a bad habit of biting her fingernails and pulling at her cuticles until her fingers bleed and have sores. Her therapist is teaching her how not to bite and pick at her fingernails using various learning principles. Her therapist is using

A) behavior modification.
B) humanistic therapy.
C) psychoanalysis.
D) existential therapy.