Bruscia, K.E在2014年提出的音乐治疗的概念是：（）。

A. Music therapy is an established psychological clinical intervention, which is delivered by HCPC registered music therapists to help people whose lives have been affected by injury, illness or disability through supporting their psychological, emotional, cognitive, physical, communicative and social needs.
B. Music therapy is the professional use of music and its elements as an intervention in medical, educational, and everyday environments with individuals, groups, families, or communities who seek to optimize their quality of life and improve their physical, social, communicative, emotional, intellectual, and spiritual health and wellbeing.
C. Musictherapyisasystematicprocessofinterventionwhereinthetherapisthelpstheclienttoachievehealth,usingmusicalexperiencesandtherelationshipsthatdevelopthroughthemasdynamicforcesofchange.（
D. Musictherapyisareflexiveprocesswhereinthetherapisthelpstheclienttooptimizetheclient’shealth,usingvariousfacetsofmusicexperienceandtherelationshipsformedthroughthemastheimpetusforchange.