Final answer:
The undamaged aircraft carriers, submarines, and fuel oil storage were important because they were critical military assets, contained classified information, and ensured the safety of the fleet's personnel.
Step-by-step explanation:
It was important that the Pacific fleet's aircraft carriers, submarines, and fuel oil storage came out undamaged in the attack on Pearl Harbor because they were critical military assets that the Pacific fleet could not function without. The aircraft carriers and submarines were vital for naval operations and power projection, while the fuel oil storage ensured that the fleet would have the necessary fuel to continue its operations.
Additionally, the aircraft carriers, submarines, and fuel oil storage contained classified military information that, if fallen into enemy hands, could compromise American military strategies and capabilities.
Furthermore, the safety of the fleet's personnel depended on the damage to the aircraft carriers, submarines, and fuel oil storage being minimized. If these assets had been destroyed or severely damaged, it would have put the lives of many sailors and officers at risk.