Gene-For-Gene Recognition Develops When a Plant's Resistance Gene

Gene-for-gene recognition develops when a plant's resistance gene

A) produces a protein that binds to specific chemicals,like small carbohydrates produced by a pathogen.
B) can bind directly to a complementary gene within the pathogen.
C) mutates in such a way as to alter its distinctive chemistry.
D) is activated by the attachment of a pathogen to the plant's cuticle.