Read the excerpt from Hamlet, Act I, Scene i. Marcellus: Is it not like the king?

Horatio: As thou art to thyself:
Such was the very armour he had on
When he the ambitious Norway combated;
So frown’d he once, when, in an angry parle,
He smote the sledded Polacks on the ice.
’Tis strange.

Marcellus: Thus twice before, and jump at this dead hour,
With martial stalk hath he gone by our watch.

Horatio: In what particular thought to work I know not;
But in the gross and scope of my opinion,
This bodes some strange eruption to our state.

What do Marcellus’s and Horatio’s characterization of the ghost imply?

that a large battle is looming
that someone is tricking them
that the kingdom is cursed
that something bad is going on