Answer :
Propane cylinders are manufactured and certified to standards authorized by A) ASTM International. Hence, option A) is correct.
Propane cylinders are manufactured and certified to standards authorized by: A) ASTM International.
ASTM International sets standards for a wide range of materials, products, systems, and services, including propane cylinders.
These standards ensure the safety, quality, and performance of propane cylinders.
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