Which of the Following Questions Should Be Included in a Machine

Which of the following questions should be included in a machine guarding self-assessment?

A) Are all exposed power shafts located less than three feet (one metre) above the working level properly guarded?
B) Are all hand tools and other hand-operated equipment inspected regularly for hazardous conditions?
C) Is compressed air used to clean tools, machines, equipment, and parts reduced to less than 100 kilopascals or 15 pounds per square inch (psi) ?
D) Are the tool rests for grinding wheels set to 3 millimetres or more of the grinding wheel?
E) Are all compressed gas cylinders inspected regularly and systematically for any signs of rust?