The diagram below shows a laboratory setup. In the diagram, flask A contains a mixture of two liquids. This flask is being heated, which is causing alcohol in the mixture to evaporate and recondense into flask B. Flask B contains pure liquid alcohol. What does this demonstrate? A. Mixtures form when pure substances chemically react to form new substances. B. Liquids must be heated until both substances are gases in order for a mixture to form. C. Mixtures can be separated into their component parts through physical processes like boiling. D. Liquids can only form mixtures with other liquids.