Final answer:
The maximum length of the corrugated metal connector is not provided in the given information.
Step-by-step explanation:
The maximum length of a corrugated metal connector used to connect a range to the gas supply line in a dwelling is not provided in the given information. The question mentions the maximum length options of 3 feet, 4 feet, 5 feet, and 6 feet, but it does not specify which one is correct. Therefore, without additional information, it is not possible to determine the maximum length of the connector.