What is a common sign of radiation exposure?

The correct answer encompasses all the listed symptoms of radiation exposure, recognizing that individuals may experience a range of effects due to radiation. Increased fatigue is a frequent sign, as the body uses considerable energy to repair cellular damage caused by exposure. Temporary headaches can also occur as a symptom of radiation exposure, particularly if the exposure is significant enough to affect overall health. Skin irritation may manifest as redness, rashes, or burns on areas of the skin that were exposed to radiation. Each symptom reflects the physiological impact radiation can have on the human body, and because all these effects can be related to radiation exposure, identifying them collectively as signs showcases the multifaceted nature of radiation impact.