A nurse palpates the client's temporomandibular joint (TM) during a head and neck examination. Which finding would warrant further evaluation

Assessment of the temporomandibular joint (TMJ) is an important part of the head and neck examination used to evaluate jaw function, alignment, and joint integrity. The TMJ allows smooth hinge and gliding movements required for chewing and speaking. Normal findings include symmetrical movement and absence of pain or abnormal sounds. Any deviation such as joint noises may indicate dysfunction or structural abnormality requiring further evaluation. A. No pain during palpation or movement of the TMJ is a normal finding and indicates absence of inflammation or joint dysfunction. The temporomandibular joint should be non-tender during examination. Lack of pain does not suggest pathology and does not require further investigation. B. Symmetrical jaw movement is an expected finding that reflects normal alignment and coordinated muscle function. It indicates that both TMJ structures are working evenly without restriction or deviation. Symmetry suggests intact neuromuscular control and joint stability. C. A cracking or popping sound during TMJ movement is an abnormal finding that may indicate temporomandibular joint dysfunction, disc displacement, or ligament irregularities. These sounds, known as crepitus, suggest irregular joint surface movement or misalignment. This finding warrants further evaluation if accompanied by pain, limited motion, or functional impairment. D. Smooth motion with jaw opening is a normal finding and reflects proper joint lubrication and healthy cartilage function. It indicates that the TMJ is moving without obstruction or mechanical interference. Smooth, pain-free movement does not require additional diagnostic follow-up.