Which of the following are common symptoms of a concussion?

The common symptoms of a concussion include headache, confusion, dizziness, and nausea. These symptoms often arise due to the impact on the brain and subsequent changes in brain function that occur following a concussive event.

Headaches are one of the most frequently reported symptoms as they often originate from trauma to the head or neck and from the disruption of normal brain activity. Confusion can occur as the brain struggles to process information and the individual may not know where they are or what has happened. Dizziness often accompanies concussions as it relates to balance issues due to the effects of brain trauma on the vestibular system. Nausea results from the disturbances in the brain that can affect the inner ear and balance, as well as from increased intracranial pressure.

This symptom set directly aligns with the physiological and neurological impacts resulting from a concussion, making it the most accurate answer. The other choices list symptoms that are not typically associated with a concussion, which further underscores the relevance and accuracy of the correct option.