The correct answer is to wear safety glasses, nitrile and FR gloves, a respirator, overalls, and static dissipative shoes or straps when cleaning dust collecting systems or removing filters that contain Co/Cr. This is because Co/Cr (cobalt/chromium) is a hazardous material that can pose health risks if inhaled or comes into contact with the skin. Therefore, it is important to have proper protection such as safety glasses to protect the eyes, nitrile and FR gloves to protect the hands, a respirator to prevent inhalation of the dust, overalls to cover the body, and static dissipative shoes or straps to prevent static electricity buildup.