A 19-year old man presents to the ED after rolling his left ankle playing basketball earlier in the evening. X-rays of the ankle do not reveal a fracture. The exam reveals a positive anterior drawer test with no endpoint on the left. Which of the following is the most likely diagnosis?A. Achilles' tendon rupture
B. Grade 1 tear of the calcaneofibular ligament
C. Grade 2 tear of the deltoid ligament
D. Grade 3 tear of the anterior talofibular ligament