Among the following fungi, which caused the Irish Potato Famine?

Why this is the correct answer
The Irish Potato Famine (1845–1852) was caused by a water mold (Oomycete) known as Phytophthora infestans, which produces a disease called Late Blight.During the mid-19th century, Ireland relied almost exclusively on a single variety of potato called the "Irish Lumper." Because these potatoes were genetically identical (clones), they had no natural resistance when the pathogen arrived from North America. The blight caused the potato tubers to rot in the ground, leading to mass starvation and the migration of millions of people.Understanding the Other OptionsTo help with your studies in Plant Pathology or Biology, here is what the other fungi listed actually do:PathogenDisease CausedCommon TargetsFusarium oxysporumFusarium WiltTomatoes, tobacco, legumes, and bananas (Panama disease).Sclerotinia sclerotiumWhite MoldOver 400 species including beans, cabbage, and lettuce.Sclerotium rolfsiiSouthern BlightPeanuts, tomatoes, and many ornamental plants.