Ophiostoma Novo-Ulmi Causes Disease Through

Ophiostoma novo-ulmi causes disease through:

A) production of chitinase which attacks beetle exoskeletons
B) production of chitinase damaging fungal structures
C) production of endotoxin released from its Gram negative cell wall
D) production of exotoxin released from its Gram positive cell wall
E) production of xylanase,destroying plant conductive tissue