Which of the Following Is True for a System at Equilibrium

Which of the following is true for a system at equilibrium?

A) ( $\Delta$ S $\degree$ _sys = $\Delta$ S $\degree$ _surr)
B) ( $\Delta$ S $\degree$ _sys = - $\Delta$ S $\degree$ _surr)
C) ( $\Delta$ S $\degree$ _sys = $\Delta$ S $\degree$ _surr = 0
D) ( $\Delta$ S $\degree$ _univ > 0)
E) None of these choices is a sufficient condition.