Answer:
D & E
Explanation:
I think this is dealing with latent heat and D & E would be the range where you will find solid and liquid phases in equilibrium, cuz it starts as gas at from A to B, B to C is gas and liquid equilibrium, C to D is liquid, D to E solid and liquid, and then E to F is solid.
good sir it seems your answer appears to be B
It depends on the substance,but for most substance it is in the gaseous state.
The answer would be C. Pb
