Please choose the correct ending to complete the given sentence: Mooping floor: A man is mopping the floor. He is mopping the floor of a hallway. a red cart

Ending1: is standing next to the mop. Ending2: is parked in front of him. Ending3: is next to the man in the hallway. Ending4: is on front a yellow door.

Answer format: ending1/ending2/ending3/ending4