Final answer:
The common clinical sign that is not associated with a hemothorax is 'Collapsed jugular veins' as it indicates hypovolemia, unlike other symptoms such as tachycardia, pallor, and labored tachypnea which are typical signs.
Step-by-step explanation:
Common clinical signs of a hemothorax include symptoms such as tachycardia, pallor, labored tachypnea (rapid and labored breathing), and potentially a mediastinal shift, where the central structures within the thorax are pushed to one side. However, one of these symptoms is not common for a hemothorax. The exception is collapsed jugular veins, which would typically indicate hypovolemia, where the blood volume is decreased, rather than hemothorax where blood accumulates in the pleural cavity. In the case of a hemothorax, one would expect jugular venous distension due to increased pressure within the chest. Therefore, the correct answer to the question, "Common clinical signs of a hemothorax include all of the following, EXCEPT," is option C: Collapsed jugular veins.