Which of the following best describes Exterior cold syndrome?

Exterior cold syndrome in Traditional Chinese Medicine (TCM) is primarily characterized by the body's response to an invasion of cold pathogens. It typically manifests with symptoms such as sudden chills and body aches, which are indicative of the body's effort to expel the cold. The presence of a floating pulse is also a key sign, reflecting the body's superficial response to the exterior pathogen.

The correct choice highlights these symptoms effectively, showing that the body is struggling against the cold invasion. In TCM, when cold attacks the exterior, it often leads to muscle stiffness, aversion to cold, and other symptoms that present themselves quickly. This acute nature of symptoms is fundamental in distinguishing it from other syndromes, such as internal conditions or chronic states.

The other options describe symptoms associated with different conditions: high fever and agitation may represent an exterior heat syndrome or internal heat, chronic fatigue and sweat often relate to deficiencies rather than external pathogens, and severe internal organ distress suggests a more profound internal disorder rather than an exterior condition.