The muscle that expands the glottis is ( ) A: lateral cricoarytenoid muscle B: posterior cricoarytenoid muscle C: interarytenoid muscle D: thyroarytenoid muscle

9.A 42-year-old man undergoes surgery for medullary carcinoma of a "noisy quality"to his voice.This condition was most likely caused by damage to the A: internal laryngeal nerve B: Recurrent laryngeal nerve C: Thyroarytenoid folds D: Vocal foles