Which of the following statements about the Gibbs function (Gibbs free energy) are generally true? Select one or more: a. The minimization of the Gibbs function in thermodynamic equilibrium (under the right conditions) is a consequence of the maximization of the entropy of the considered system. b. The minimization of the Gibbs function in thermodynamic equilibrium is a consequence of the maximization of the total entropy of the system and the environment. C. The Gibbs function is minimized in thermodynamic equilibrium for a system whose temperature T, volume V and number of particles N are constant. d. The Gibbs function is minimized in thermodynamic equilibrium for a closed system whose temperature T and pressure p are constant