The correct answer is C. Waste.
Thrift is the quality of being careful with money or resources. It means to avoid waste and to use things carefully.
Purchase is the act of buying something. It means to
acquire something by paying money for it.Destroy is to damage or ruin
something completely. It means to cause something to cease to exist or to be unusable.Invest is to use money to buy something that is expected to produce a profit or income in the future. It means to put money into something in the hope of getting a return on it.
In this case, the antonym of thrift is waste. This is because waste is the opposite of thrift. Waste is the act of using something carelessly or without thinking about the consequences. It is the opposite of being careful with money or resources.