Please choose the correct ending to complete the given sentence: Mooping floor: A man is mopping inside an airy building. the floors

Ending1: shine as he moves the mop over the surface. Ending2: are red and black and there are several mop outs going. Ending3: are covered with black powder. Ending4: are as shiny as they were before he mopped many times in his life.

Answer format: ending1/ending2/ending3/ending4