In times of war, people usually buy and store more food as a ___

In times of war, people usually buy and store more food as a _______ against shortages.
A、carefulness
B、preparation
C、precaution
D、prediction
【正确答案】：C
【题目解析】：carefulness仔细；慎重；preparation预备；准备；precaution预防，警惕；预防措施；prediction预报；预言。句意：在战争时期，人们通常购买和储存更多的食物以预防短缺。