Coalition- An alliance for combined action, a temporary alliance of political parties forming a government or (a) state(s).
The correct answer here is B. The supplies they have are severely depleted thanks to the vandals that have destroyed not only their homes but also all of the provisions they had in stock. They are trying to feed the remaining population, 7000 of them, by rationing food from the single barn that was not destroyed.
Specifically, the Battle of the Coral Sea prevented the Japanese carriers Shōkaku and Zuikaku from joining in the Battle of Midway one month later.