As a result of an accident, a person sustained a spinal injury. Damage to the spinal cord is suspected. Damage to the I–II sacral segments of the spinal cord can be identified if a certain reflex is impaired. Name this reflex.

• A. Elbow flexor reflex of the forearm
• B. Extensor reflex of the forearm
• C. Positive support reflex
• D. Achilles tendon reflex
• E. Patellar (knee-jerk) reflex