In a study, scientists analyzed demographic data from the United States and 39 European countries from 1964 to 2007. They found that from 1964 to 1975, the birth rate of male babies was higher than that of female babies. After 1986 A similar phenomenon has also occurred in many Eastern European countries. Scientists have analyzed that this phenomenon is closely related to nuclear power plant leaks and nuclear radiation leaks caused by nuclear tests. It is likely related to the Chernobyl nuclear accident. Which of the following, if true, would best support the above conclusion? ['According to data analysis, the male birth rate in Japan after World War II has not increased significantly compared with some European countries.', 'Under normal circumstances, the birth rate of men is generally slightly higher than that of women, the ratio is about 105: l00, but the average life expectancy of women is higher than that of men, so the ratio of men and women is usually balanced.', "Research data show that after the Chernobyl nuclear accident, the proportion of newborn boys and girls born in Ukraine's recent Belarus is higher than in distant France.", 'The experimental results show that nuclear radiation particles have certain damage to the X chromosome in sperm. After being exposed to nuclear radiation, the male offspring have a higher birth rate than females.']