A Perturbation or Stress to a Chemical Reaction at Equilibrium

A perturbation or stress to a chemical reaction at equilibrium _________

A) increases the free energy of the system.
B) decreases the free energy of the system.
C) neither increases nor decreases the free energy of the system.
D) may increase or decrease the free energy of they system depending on the nature of the stress.
E) causes the free energy of the system to become zero.