An 88-year-old woman is brought in by ambulance after falling in her house. She complains of right hip pain. On physical exam, her temperature is 99.1 ° F, blood pressure is 110/ 75 mmHg, pulse is 110/ min, and respirations are 20/ min. The leg appears externally rotated and shortened. X-ray shows femoral neck fracture. Which of the following is a complication of femoral neck fracture?
(A) Avascular necrosis
(B) Lumbar radiculopathy
(C) Long-term loss of hip abduction
(D) Long-term loss of hip adduction
(E) Osteosarcoma