Based on the map, which of the following is true about the Bubonic Plague, also known as the Black Death?

A.
It spread faster in colder climates than in warmer ones.
B.
It spread quickly across land but could not travel across water.
C.
It spread only to a small area of Europe, sparing most people.
D.
It spread from the Mediterranean to the north of Europe.

D. It spread from the Mediterranean to the north of Europe.