Alice you have a dilemma now. Either persist with the obvious head-in-the-sand denial; problem is its getting really embarrassing now.
Or you could say that the person who wrote all the later material was unaware of the previous teaching regarding 1799, 1878 etc and made a genuine mistake.
In which case you need to select (A) and then plead mitigation.
It seems TD is right, jw's really are capable of arguing 2+2=5