Answer:
2) Inducible post-infection. Chitosan works by stimulating the immune response of potato tubers cells, which is similar to the role of inducible post-infection. Inducible post-infection is a process in which a host cell releases molecules in response to an infection that activate the immune system, leading to an increased production of defensive proteins, which can then help fight off the infection. This process is similar to how chitosan works, as it triggers an immune response in the cells that can help fight off the infection.