Anthony Is a Trained Exterminator Who Received Yearly Instruction Regarding

Anthony is a trained exterminator who received yearly instruction regarding precautions that should be taken in relation to the use of pesticides. After being told that he suffered allergies and other ailments based on exposure to the pesticides, Anthony sued the manufacturers of the pesticides at issue based on a failure to warn theory. The defendants' best argument based on Anthony's prior training is the ________ defense.

A) Trained technician
B) Sophisticated-user
C) Knowledgeable user
D) Unharmed user
E) Workers' compensation