The answer is D. All of these
Explanation- All of these are true about mixtures and compounds.
Mixtures and compounds are both made of two or more different substances.
The key difference between mixtures and compounds is that a compound is a new substance that forms when other substances chemically combine. The new substance that is formed has different properties from the original substances.
A mixture is simply a physical combination of two or more substances. Some of the individual properties of the original substances are retained by the mixture.