Consider a System Consisting of Two Einstein Solids $P$ And $Q$ In Thermal Contact

Consider a system consisting of two Einstein solids $P$ and $Q$ in thermal contact. Assume that we know the number of atoms in each solid and $\varepsilon$ . What do we know about the system if we also know the total energy of the combined system?

A) Its macrostate
B) Its microstate
C) Its macropartition
D) Its microstate and macropartition
E) Its macrostate and macropartition
F) Its macrostate and microstate
G) Its macrostate, microstate, and macropartition