单选题：已知下列反应的平衡常数：‍H(g)十S(s)＝HS(g)()K‍S(s)十O(g)＝SO(g)()K‍‌则反应H(g)十SO(g)＝O(g)十HS(g)的平面常数应为‍‌‍AK＋KBKKCK·KDK/KEK/K