In which of the following cases was the manufacturer held liable based on design defect:

In which of the following cases was the manufacturer held liable based on design defect:
 a. a worker lost a leg because he fell into a machine that was running, despite the removal of a metal plate. The court held that the machine should not have been able to run with the plate removed.
  b. a restaurant employee was seriously burned when he tried to retrieve something that fell out of his shirt pocket and into a commercial French fryer machine. The court held that the machine could have been designed more safely.
  c. a child pushed the emergency stop button on an escalator, causing a person to fall and be injured. The court held that the button was too attractive and accessible to children.
  d. all of the other specific choices are correct
  e. none of the other specific choices are correct