Which of these is not true of the spread of the bubonic plague described in boccaccio's quote?
a) trade and travel decreased in the 1400s in europe because so many people were scared of contracting this deadly disease.
b) many europeans believed that the spread of the bubonic plague was caused because of god's wrath on the sins of mankind.
c) the rule of the mongols to spread the bubonic plague by make travel along the silk roads safer and more effective.
d) the plague killed millions as merchants unwittingly brought it with them from european town to european town as they traveled.