24 下列何者具開啟聲門裂(rima glottidis)之作用? (A)環杓後肌(posterior cricoarytenoid muscle) (B)環甲肌(cricothyroid muscle) (C)環杓側肌(lateral cricoarytenoid muscle) (D)甲狀舌骨肌(thyrohyoid muscle)