The internal energy change when a system goes from state A to B is 40 kJ/mol. I the system goes from A to B by a reversible path

The internal energy change when a system goes from state A to B is 40 kJ/mol. I the system goes from A to B by a reversible path and return to state A by a irreversible path, what would be the net change in internal energy?
A. 40 kJ
B. `gt 40kJ`
C. `lt 40kJ`
D. zero

The internal energy change when a system goes from state A to B is 40 kJ/mol. I the system goes from A to B by a reversible path and return to state A

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