Which of the following are the precautions before replacing FRU components? (Multiple choice)

Which of the following are the precautions before replacing FRU components? (Multiple choice)
A . Confirm that the new parts are free of oxidation, chemical corrosion, no parts falling off, no damage to transportation and other defects.
B . When handling and transporting parts, you must use the special antistatic bag. In the routine maintenance of the equipment, the parts should be arranged, registered and repaired.
C . Locate the installation location of the cabinet, controller enclosure, etc., where the replacement parts are located, and attach labels on them to avoid misoperation.
D . unplug the plug-in parts should be evenly pulled out, do not vigorously or slowly pulled out.

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Answer: ABC