The correct answer is B) Check the corresponding (left versus right) parts of the body. This is the correct approach because it allows the examiner to systematically check for symmetry and differences between the left and right sides of the body, which can indicate injuries or abnormalities. Checking corresponding body parts is a standard technique in emergency medical assessment to help identify potential problems or trauma. The other options are not as effective or appropriate for a full body examination. A) may not be applicable in all cases, C) focuses only on discoloration and not the overall condition, and D) is too narrow in scope, looking only at the eyes rather than the entire body.