Can any system possess heat?

What is the meaning of equilibrium in mechanics and equilibrium in thermodynamics?

The equilibrium state of a thermodynamic system is described by what?

Who formulated the zeroth law of thermodynamics?

When do systems at different temperatures attain thermal equilibrium as time passes?

Given are statements for certain thermodynamic variables:
$(A)$ Internal energy,volume $(V)$ and mass $(M)$ are extensive variables.
$(B)$ Pressure $(P)$,temperature $(T)$ and density $(\rho)$ are intensive variables.
$(C)$ Volume $(V)$,temperature $(T)$ and density $(\rho)$ are intensive variables.
$(D)$ Mass $(M)$,temperature $(T)$ and internal energy are extensive variables.
Choose the correct answer from the points given below: