Final answer:
The correct answer to the question about how far a flue liner can protrude above a chimney is to follow local building codes. It's important to adhere to these codes for safety and functionality.
Step-by-step explanation:
The question relates to the installation standards for a flue liner, which is part of a chimney system in a house or building. Typically, the amount a flue liner can protrude above the chimney is regulated by local building codes. It is not a one-size-fits-all answer, as the regulations can vary by jurisdiction. However, in general, a flue liner should not protrude excessively above the chimney top to avoid potential damage or interference with the chimney's draft.
The correct answer is d. Follow local building codes. It's essential to consult with local building authorities or the building code for a specific area. These codes are established to ensure safe construction practices and functional setups for buildings and associated systems, including chimneys.