What’s the main implication of the fable the Oil Burns Itself Out illustrate?

A、It’sdifficulttounderstandthehappinessofothers;
B、Weshouldthinkgloballyandactlocally;
C、Ourtoppriorityinlifeistoimprovecompetitiveness;
D、Weshouldlearnhowtopreserveourstrengthandprepareforthefuture