Which of the following statements about the blood supply to the hip are true?

A. The medial femoral circumflex artery circles around to the posterior aspect of the hip, where it becomes confluent with the retinacular blood vessels.

B. A small portion of the blood supply of the femoral head is provided by the obturator artery via the ligamentum teres.

C. Displacement of a femoral neck fracture can disrupt the branches of the medial femoral circumflex artery.

DISCUSSION: The blood supply to the femoral head is provided predominantly by the branches of the medial femoral circumflex artery, which take a posterior course and are confluent with the retinacular vessels. The lateral femoral circumflex artery runs anteriorly.