Please choose the correct ending to complete the given sentence: Rollerblading: People are doing tricks on roller blades. a man

Ending1: does a stroke on a skateboard. Ending2: jumps down a flight of stairs on roller blades. Ending3: down in black scrubs, walks across the ice. Ending4: is holding a camera behind jump ropes.

Answer format: ending1/ending2/ending3/ending4