Recently, a health care hospital in the South conducted a 10-week weight loss test. The participants lost an average of 9 kg, the male participants lost an average of 13 kg, and the female participants lost an average of 7 kg. Female participants are heavy. If the above is true, then the following conclusions are correct: C. ['Female participants weigh less than male participants before losing weight.', 'More female participants than male participants.', 'More male participants than female participants.', 'Male participants are lighter than female participants after losing weight.']