Concept:An idiom is a phrase with a figurative meaning different from its literal words.Explanation:The idiom "to put out" commonly means to extinguish a fire or stop something from burning.For example, "He put out the candle" means he made it stop burning.Among the given options, only "to extinguish" matches this meaning.The other options—postpone, go out, wait—do not fit the idiom in this context.Answer:Option C: To extinguish