Lignin is difficult to break down in part because

A)Covalent bonds form between free radicals, creating a
structure that is hard for enzymes to digest

B)The statement is false: lignin decays quickly in the
environment

C)Ca2+ provides extensive cross linking between carboxylic acid
side groups

D)Individual strands are assemble in a complex of that excludes
water

E)Cell walls contain metabolites that are toxic to
detrivores