The traditional view is that although the depleted uranium used to make depleted uranium bombs is low in time, it can still cause damage to human chromosomes, which can cause tumors or cancer. However, in a recent study, researchers reported that veterans who had been exposed to depleted uranium bombs were discharged. The blood cells of the veterans have been studied. So far, no chromosome breaks and duplications have been detected, and no negative health effects caused by exposure to depleted uranium bombs have been found. Therefore, relevant researchers believe that low-depleted uranium depleted bombs will not be harmful to human health. Make an impact. Which of the following, if true, would most weaken a researcher's conclusion? ? ["Residents of a certain place have filed a lawsuit with the court, claiming that the country's military test of depleted uranium bombs has affected the health of the residents of the place.", 'Many image experts in the world are working to solve the radioactivity problem of depleted uranium bombs.', 'Data show that offspring of these veterans have a higher rate of birth defects than normal.', 'People who have not been exposed to depleted uranium bombs can also have tumors or cancer.']