Please choose the correct ending to complete the given sentence: Tumbling: There are a few girls doing gymnastics in a gym. There's a young girl wearing an athletic tank top and shorts doing back flips in her backyard. she

Ending1: is in the mid teen position or two. Ending2: is on a blue mat with red laces on the floor. Ending3: flips over a series of jumps until she reaches the end of the jump rope. Ending4: continues to back flips in a fast manner.

Answer format: ending1/ending2/ending3/ending4