The carbon dioxide cylinders of a fixed fire extinguishing system may be located inside the protected space if the quantity of CO2 required to protect that space is not more than __________.

Correct Answer: Option A — 300 pounds

46 CFR allows CO2 cylinders to be located within the protected space only if the total quantity of gas required does not exceed 300 pounds. This limitation minimizes the risk of the entire supply being compromised by the fire it is intended to extinguish, ensuring sufficient agent remains available.