Please choose the correct ending to complete the given sentence: Removing ice from car: The outside of a building is shown on a snowy day. several tracks from shoes

Ending1: are seen in the sidewalk. Ending2: to shoes are being covered with snow from a car to a building. Ending3: blow snow onto a subway of a city. Ending4: is shown on the ice.

Answer format: ending1/ending2/ending3/ending4