Identify the correct statement for the change in Gibbs energy $(\Delta G_{\text{system}})$ for a system at constant temperature and pressure.

• A
  If $\Delta G_{\text{system}} > 0$,the process is spontaneous.
• B
  If $\Delta G_{\text{system}} = 0$,the system is in equilibrium.
• C
  If $\Delta G_{\text{system}} = 0$,the system moves in a specific direction.
• D
  If $\Delta G_{\text{system}} < 0$,the process is non-spontaneous.