Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

Correct option is B

Downy mildew of grapes led to Bordeaux mixture discovery.
Farmers used copper-lime mixture to deter thieves.
This unintentionally prevented fungal infection.
It became the first widely used fungicide.
Revolutionized plant disease management.
Still used for many fruit and vegetable crops.