A Carnot Cycle, Operating as a Heat Engine, Consists, in the Order

A Carnot cycle, operating as a heat engine, consists, in the order given, of

A) an isothermal expansion, an isothermal compression, an adiabatic expansion and an adiabatic compression.
B) an adiabatic expansion, an adiabatic compression, an isothermal expansion and an isothermal compression.
C) an isothermal expansion, an adiabatic compression, an isothermal compression and an adiabatic expansion.
D) an adiabatic compression, an isothermal compression, an isothermal expansion and an adiabatic expansion.
E) an isothermal expansion, an adiabatic expansion, an isothermal compression and an adiabatic compression.