Which of the following contributed to widespread disease in Germany?

Melting down bells put unhealthy fumes in the air, which weakened the lungs of the German population.

The British fleet infected supplies with smallpox, which quickly spread as supplies were moved.

The blockade created food and clothing shortages that left civilians weak, cold, and unable to fight off disease.

Germany had to dig new coal mines, spreading black lung disease and shrinking its workforce.

The blockade created food and clothing shortages that left civilians weak, cold, and unable to fight off disease.