In order to protect people's lives and property and reduce environmental pollution, a city's public security organ issued a ban on the sale of fireworks and firecrackers. This year, no citizens in the city were injured by fireworks and firecrackers. If one of the following is true, the above argument is most questioned? ["The city's fire department has issued more police than in previous years.", 'Citizens see someone setting off fireworks.', 'The police received a report that a large number of fireworks was piled up in the home.', 'Police smashed several dens producing fireworks.']