After Trauma to the Musculoskeletal or Nervous System, Reflex Sympathetic

After trauma to the musculoskeletal or nervous system, reflex sympathetic dystrophy can occur. When does this complication occur? When:

A) the person complains of numbness beyond a cast and toes are pale with delayed capillary refill.
B) the person complains of leg swelling, pain, tenderness, and cramping.
C) the person's fracture has not healed by the usual time expected.
D) the person complains of persistent pain, swelling, and changes in temperature.