Read the passage. the night before, some 10 miles outside the entrance to pearl harbor, five submarines carrying two crewmen and two torpedoes each were launched from larger "mother" subs. their mission: enter pearl harbor before the air strike, remain submerged until the attack got underway, then cause as much damage as possible. which best identifies a key concept and explains how it is developed? question 8 options: the concept is that the japanese planned a surprise attack; it is developed by explaining the preparations they made to avoid being seen. the concept is that japanese fleet was stronger than the u. s. fleet; it is developed by describing how many ships they had. the concept is that japanese made little preparations for the attack; it is developed by describing how disorganized the attack was. the concept is that japanese were the only nation to possess submarines; it is developed by describing the sophisticated features of the equipment.