The options of the question are A) It had no discernable pattern. B) It followed common sea routes. C) It traveled chiefly by land. D) Landlock areas were the safest.
The correct answer is B) It followed common sea routes.
What the map shows about the spread of the Bubonic plague is that It followed common sea routes.
In 1300, the plague came from Central Asia to Europe. It arrived in Europe by sea and by the trade routes. The people named the plague Bubonic because of the buboes that appeared in different parts of the body. People died from this Black Death in a matter of days. It was believed that the causes of death were plagues, rats, fleas, poisoned food, and extremely poor living conditions.