Which of the Following Statements Describes a Mixture

Which of the following statements describes a mixture?

A) The component elements of a mixture can be present in any mass ratio.
B) Chemical techniques are required to separate the components of a mixture.
C) The component elements of a mixture can be present in any mass ratio and chemical techniques are required to separate the components of a mixture.
D) The component elements of a mixture cannot be present in any mass ratio and chemical techniques are not required to separate the components of a mixture.