14 Our natural history as a species is a vast canvas of events whose successes and tragedies were often determined by the availability or _____ of food.
(A) scarcity
(B) subsidy
(C) propriety
(D) omnipresence

在我們的歷史中，人類的成功和悲劇發生往往是由食物的供應或匱乏所決定。