It marked the end of the hunter gatherer ethos and the beginning of what we call civilized societies.
A. - yes, you need to feed the empire!
B. - yes, you need to defend the empire!
C. - yes, you need to govern the empire!
D. - no, this would actually be detrimental to the empire, revolts would be rather bad than good for it.
The correct answer is the Battle of the Coral Sea
Although both sides were winners in certain respects, it was a draw in the end which was a bad thing for Japan. The Japanese army had a tactical victory through the numbers of US troops defeated and ships sunk, the US had a strategic victory because Japan could not prepare for the following battles because of the losses suffered in this one.