The Bubonic Plague that killed a quarter of the world's population during the middle ages was caused by what agent?

The Bubonic Plague that killed a quarter of the world’s population during the middle ages was caused by what agent?

January 6, 2015 No Comments yet Posted in: Trivia crack answers

Question: The Bubonic Plague that killed a quarter of the world’s population during the middle ages was caused by what agent?

Options:

Ticks

Lice

Worms

Fleas

Correct answer:

Fleas