Answer:
c)Mixtures are composed of two or more substances.
Step-by-step explanation:
From the given choices, it is true that mixtures are composed of two or more substances.
- Mixtures have indefinite composition i.e. they consist of two or more compounds in any proportion by mass.
- Constituents retain their identity.
- The constituents reacts differently to changed conditions.
- They can easily be separated into constituents.