Which of the Following Is the Best Definition of a Microstate

Which of the following is the best definition of a microstate as it pertains to entropy on the molecular level?

A) the state (solid,liquid,or gas) of a small cluster of atoms or molecules
B) a property of a small cluster of atoms and molecules,such as temperature,that is independent of how the property was achieved
C) the set of vibrational,rotational,and translational energy levels in a system
D) a unique specification of the vibrational,rotational,and translational states of a single molecule in a system
E) a unique specification of the vibrational,rotational,and translational states of all of the particles in a system