What conclusion can be drawn from the zeroth law of thermodynamics?

In a cyclic process, the internal energy of the gas

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:

Heat is not an object in a body. True or False?

The state of a thermodynamic system is represented by

Is it necessary to change the volume and pressure to bring the equilibrium of a system? Why?