Please choose the correct ending to complete the given sentence: Kneeling: Two men on one knee demonstrate a hip flexxer stretch in a therapy gym. the man wearing a black t - shirt

Ending1: spins his body on the uneven concrete to demonstrate a toss. Ending2: prepares to flexes one of his knees muscles. Ending3: uses the man wearing a green t-shirt as a model to demonstrate the hip flexxer stretch. Ending4: does the splits on front two parallel bars.

Answer format: ending1/ending2/ending3/ending4