You are treating a 21-year-old female patient who was entrapped for more than 30 minutes after her vehicle struck a utility pole. The patient is complaining of hip pain. Her airway is patent with non-labored breathing and weak radial pulses, lungs are clear and equal, abdomen soft and non-tender, pelvis unstable, and right lower extremity is swollen with delayed capillary refill. Her left lower extremity has positive pulses, motor, and sensation. Which of the following suggests a crush injury is present?

a) Unstable pelvis
b) Weak radial pulses
c) Swelling in the right lower extremity
d) Delayed capillary refill in the right lower extremity