Bob Is a Trained Exterminator Who Received Yearly Instruction Regarding

Multiple Choice

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

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