After the expansion of a residential area, newly moved residents complained to the real estate company that the nearby airport was too noisy and unbearable. However, the old residents did not support them and said that they also felt the noise was too loud. The company claimed that they would not take the health of the residents However, they decided not to take action on the complaint. They thought the airport noise was not great because the old residents did not complain. Which of the following,ifis true,can best refute the above view of the real estate company? ['Old residents usually wear earplugs to solve problems. They think it is effective.', 'Old residents have no complaints of solidarity. It is because their hearing has been dulled due to long-term noise.', 'Real estate underwriters do not live in this neighborhood. Therefore they do not feel the noise of the nearby airport.', 'Some new residents are overly sensitive to airport noise. Their complaints are suspected to be difficult.']