According to Baidu question bank, the meteorological department in a certain place predicts that the probability of rain on a certain day is 90%, which means: () A. It may rain in 90% places on this day. B.it may rain 90% of the day. C. the rainfall may reach 90%. D.the probability of rain is 90%. The answer is D, and the probability of rain is 90%. Therefore, 90% rainfall means that there is a 90% chance that it will rain on this day. The examination paper of this question comes from the mathematics examination questions of liberal arts in Jiaxing Senior Two.