Although there is no denying that something killed a third of the population of Ancient Athens, there has been debate as to cause for many years. A historian who lived through it called it The Plague and so for many years, it was accepted to be Yersinia pestis, the same as the bacteria responsible for the Black Death. Recently, though, scientists have become convinced that the outbreak was actually due to typhoid. Given that this opinion of an event that occurred hundreds of years ago has only recently changed, what conclusion can be reached?

A.
Historians understand the language of written records more clearly and have discovered that the symptoms match typhoid.

B.
Scientists have been able to examine samples of human teeth found in the Athens area and isolated typhoid in the pulp.

C.
A recent resurgence of typhoid in the Athens area leads scientists to believe that the climate is perfect for typhoid but not for Yersinia pestis.

D.
There is no real reason for the change except that some scientists believe the plague is just a catch all.