Nhận biết (M1)

Environmental regulations now require HVAC (heating, ventilation, and air conditioning) technicians to ______ R-22 refrigerant from existing cooling systems rather than venting it during repairs; this careful collection process prevents the ozone-depleting substance from causing atmospheric damage and allows for proper disposal or reclamation later.

Which choice completes the text with the most logical and precise word or phrase?

• A.

  release

• B.

  measure

• C.

  shield

• D.

  recover