Calculate the Value of DS ^$\circ$ for the Reaction Shown: at 25

Calculate the value of DS ^$\circ$ for the reaction shown: At 25 ^$\circ$ C the values of entropy in J K^-1 mol^-1 are ammonia, 192.77; nitrogen, 191.61; and hydrogen, 130.68.

A) +969.19 J/K
B) +393.20 J/K
C) +390.88 J/K
D) +259.03 J/K
E) +198.11 J/K