This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower Extremity, Subject name: Anatomy
What is true about iliotibial tract: 
Select and explain. 
A. Thickening of fascia lata, B. Insertion of gluteus medius into it, C. Runs along medial aspect of thigh, D. Inserts to medial aspect of tibia
A: Thickening of fascia lata
Answer: A: Thickening of fascia lata 
Explanation: Ans. A. Thickening of fascia lataThe iliotibial tract is a longitudinal fibrous reinforcement of the fascia lata. The action of the ITB and its associated muscles is to extend, abduct, and laterally rotate the hip. In addition, the ITB contributes to lateral knee stabilization. It originates at the anterolateral iliac tubercle portion of the external lip of the iliac crest and inserts at the lateral condyle of the tibia.The gluteus maximus muscle and the tensor fasciae latae insert upon the tract.