must be solid. could be either solid or liquid. must be liquid. could be either liquid or gas.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A sample in a cylindrical container has a cylindrical shape and a fixed volume. The state of matter of the sample
Possibilities:
- must be solid.
- could be either solid or liquid.
- must be liquid.
- could be either liquid or gas.

could be either solid or liquid.