A state statute requires machinery in industrial plants to include automatic shut-off switches accessible to each employee working on the machine. Steel Company's (SC's) equipment does not have the switches. Trudy, an SC employee, suffers an injury that an accessible shut-off switch would have prevented. Trudy's best theory for recovery against SC isa. assumption of risk.b. negligence per se.c. res ipsa loquitur.d. strict liability.