Since this year, August 8th will be set as National Fitness Day  A, B, C, and D discuss the nature of National Fitness Day  A said: Everyone in our office knows that this is not a statutory fitness activity day  B said: If Xiao Zhang says this is not a statutory fitness activity day, then he will consider it a statutory'National Sports Day'  C Said: Xiao Zhang said that this is not a legal fitness day, nor is it a legal anniversary of the Beijing Olympic Games  Ding said: Someone in our office does not know that this is a legal fitness day, but thinks it is a sports festival
It is known that only one of the four people mentioned above is not true
A told lies.