​Extreme,sudden onset fatigue and weakness that may last several weeks

A) common cold
B) influenza
C) allergy

Sudden Onset

Refers to the rapid development of symptoms or conditions, often without warning.

Extreme Fatigue

A condition of overwhelming and persistent tiredness or lack of energy not relieved by rest.

Common Cold

A viral infectious disease of the upper respiratory tract characterized by symptoms like sneezing, coughing, sore throat, and runny nose, usually self-limiting in nature.