What is the first action in the field cylinder change procedure?

What is the first action in the field cylinder change procedure?

• A. Pause work and move to a safe area with a buddy.
• B. Close valve and release residual air.
• C. Inspect for damage or leaks.
• D. Pause work, move to a safe area with a buddy; close valve; release residual air; disconnect old cylinder; inspect for damage or leaks; connect new cylinder; slowly open valve; confirm air flow and gauge reading; secure and resume.

Answer: (D)