If I were the defender, I would declare that my fighter and tactical bomber were flying Maritime Air Patrol.
On Page 35, 8.7 Maritime Air Patrol, Carrier-Based Aircraft, “Aircraft on Carriers have the same MAP range as their land-based counterparts. Thus, they can reach 1 sea zone away from the sea zone they are currently in. Note that if the Carrier moves or is destroyed, the aircraft must have another suitable landing spot, otherwise it will be eliminated.”
I’d pick answer 4. Your planes remain in that sea zone, flying MAP as long as they have a suitable landing spot. Long-range Aircraft only increases the MAP range of medium bombers so you need a landing spot that is 1 away. If you don’t have a space to land that is 1 away, then they are destroyed (so 3 would be correct in such a case).
Here are two videos I made about MAP:
10:55 - MAP Discussion, 14:13 Long-Range Aircraft’s affect on MAP – https://www.youtube.com/watch?v=yFhtShzVL2A
9:33 - Carrier-Based MAP – https://www.youtube.com/watch?v=Q-DaBgO_XUk