A social agency released the results of the next long-term social survey, which showed that in the 13 years after marriage, women had grown an average of 13 kg and men had grown an average of 20 kg. The agency concluded that marriage can make People get fat. Which of the following, if true, is most likely to challenge the above conclusion? ? ['If the survey time is 3 or 31 years, the weight of the surveyed person will be much smaller than the above increase.', 'In the 13 years after marriage, some of the men surveyed gained less than 20 kg in weight.', 'Singles of the same age as those surveyed, women have grown an average of 16 kg in 13 years and men have grown an average of 25 kg.', 'During the 13 years after marriage, some of the men surveyed had lost significant weight.']