Abstract administrative behavior refers to the behavior of a general binding decision and order made by an administrative agency for an unspecified object. According to the above definition, which of the following is abstract administrative acts? ['A city government has introduced traffic control measures for vehicles that are restricted by tail number.', 'The natural gas company stipulates that users who want to install natural gas must purchase "Tianfei" brand cookers.', 'One night, the traffic police department concentrated on drunk driving and punished dozens of drivers.', 'A city planning bureau approves a real estate development company to build a commercial house.']