With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Even though it is no longer viable for large scale cultivation, Gros Michel is not extinct and is still grown in areas where Panama disease is not found. Likewise, Dwarf Cavendish and Grand Nain are in no danger of extinction, but they may leave supermarket shelves if disease makes it impossible to supply the global market. Because we can't yet know if any existing cultivar can replace Cavendish bananas, various hybridisation and genetic engineering programs are attempting to create a disease-resistant, mass-market banana. One such strain that has emerged is the Taiwanese Cavendish, also known as the Formosana.
text_B: Is it possible that a previously-discovered variety of banana that simply has not yet been commercialized could become the successor to the Cavendish?
YES.