Plants Are Affected by an Array of Pathogens

Plants are affected by an array of pathogens. Which of the following is not a plant defense against disease?

A) cells near the point of infection destroying themselves to prevent the spread of the infection
B) production of chemicals that kill pathogens
C) acquiring gene-for-gene recognition that allows specific proteins to interact so that the plant can produce defenses against the pathogen
D) a waxy cuticle that pathogens have trouble penetrating
E) All of the above are plant defenses against disease.