Final answer:
The parent's statement that acknowledges the client's diagnosis of bulimia nervosa is: 'She won't let me take the trash from her room. I'm concerned about what she has in there.' This indicates awareness of the client's behavior and attempts to hide food containers.
Step-by-step explanation:
The parent's statement that acknowledges the client's diagnosis of bulimia nervosa is: 'She won't let me take the trash from her room. I'm concerned about what she has in there.' This statement indicates awareness of the client's binge eating behavior and attempts to hide food containers, which are common behaviors among individuals with bulimia nervosa.