Power Tool Company Manufactures Table Saws

Power Tool Company manufactures table saws.These saws have several safety devices including a permanent blade guard.This guard keeps the user's hands from touching the blade while it is moving.Ralph buys a Power table saw,but he takes off the blade guard because it inhibits the type of work he wants to do.Later,Ralph is injured while using the saw.If the blade guard had been left on,Ralph would not have been injured.Ralph sues Power Tool Co.under a strict liability theory.The best defense that Power could raise based on these facts is:

A) supervening event
B) assumption of risk
C) generally known dangers
D) state of the art
E) misuse of the product