A8 (2 marks) An engineering company has identified that a safety guard has only been fitted to half of the available machines in its factory, but the guards work as intended when fitted. Without the safety guard, workers face risk of serious injury or death. Which of the following statements best describes the safety guard? Select one: O a. The safety guard is an object and is a partially effective control. O b. The safety guard is a system of controls. O c. The safety guard is an object and is an effective control. O d. The safety guard is an object and is a partially reliable control