Which of the Following Was an Important Difference Between the Plague

Which of the following was an important difference between the plague that struck Europe in the fourteenth century and the one that struck India and China in the nineteenth century?

A) There are no reports of massive rat die-offs in fourteenth-century records.
B) The medieval plague was transmitted only through fleabites.
C) The fourteenth-century outbreak spread much slower than the nineteenth-century epidemic.
D) The fourteenth-century outbreak caused much less death and disruption than the nineteenth-century epidemic.