Please choose the correct ending to complete the given sentence: Polishing shoes: A man picks up a brown boot and brushes it. A man opens an aerosol can and sprays the boot. a man

Ending1: fills a metal tire with aerosol. Ending2: launches a bicycle backwards into a car. Ending3: flushes a toilet and squirts some water onto the shoe. Ending4: rubs the products of a black tube on the boot's sole edge.

Answer format: ending1/ending2/ending3/ending4