A compound is where two or more elements have chemically bonded, and a mixture is where there are two or more elements are grouped together, but they are not chemically bonded. An example of a mixture would be salt dissolved in water, and an example of a compound would be water (which is made up of 2 Hydrogen and 1 Oxygen bonded together)
tl;dr: I would go with B, basically.
B.
Both compounds and mixtures are made up of elements. ;
The chosen statement is B: Both compounds and mixtures are made up of elements. Elements are the simplest forms of matter, compounds are combinations of elements in fixed ratios, and mixtures consist of substances that can be separated physically. This highlights the essential building blocks of matter and how they relate to one another.
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