The correct answer is B. something is very wrong in Denmark. When they see the ghost of the late king, Horatio and the watchmen start thinking that it must bring bad luck to Denmark and that something awful is going to happen, which excludes A and C as correct answers. D is just silly.
During the old times, people believed that if you see a
ghost it is thought to be badluck that will eventually happen to you. In the
case of the play, it is an assumption that something will happen to the
country when they saw the ghost of the old king.
