A mineral is an inorganic solid that has an orderly internal structure. This means that atoms are structured in a certan specific way, giving the mineral unic properties. Also, a mineral has a defined chemical composition.
The first option can not describe a mineral because the rock formed when lava cools down does not have a specific structure and also it does not have a defined chemical composition, but it is a mixture of different components such as iron and magnesium.
The second option can not be describing a mineral because in this case also the atoms do not have the specifit arrangement of a crystal.
The third option is the onlyone that describes a mineral because the result of the process is a solid that has an orderly internal structure and a characteristic chemical composition. As the solution cools down the solute excess starts to form the crystal and the atoms are located in a specific arrangement