Final answer:
Option B: "I may begin to associate my therapists with important people in my life" indicates an understanding of free association.
Step-by-step explanation:
Free association is a therapeutic tool used in psychoanalysis, which involves the client speaking freely and spontaneously, without censorship or judgment. Out of the given client statements, option B: "I may begin to associate my therapists with important people in my life" indicates an understanding of free association. This statement suggests that the client recognizes the potential for making connections between their therapists and significant individuals from their past or present life, which can provide insights into their unconscious mind.