Answer:
The crop failures were caused by late blight, a disease that destroys both the leaves and the edible roots, or tubers, of the potato plant. The causative agent of late blight is the water mold Phytophthora infestans. The Irish famine was the worst to occur in Europe in the 19th century.
I think B is the most accurate answer because knowing the daily weather forecast can help you pick a reasonable outfit for a cold or hot day
It's false by adding access to waterways will have an greater impact on waterways.