Please Please help me Read the passage.
excerpt from Act I, Scene 1, in Hamlet by William Shakespeare
In this excerpt, the ghost of the dead king appears to a few soldiers.

[Enter Ghost, armed.]

Bernardo:
In the same figure, like the king that's dead.
Marcellus:
Thou art a scholar; speak to it, Horatio.
Bernardo:
Looks it not like the king? mark it, Horatio.
Horatio:
Most like:—it harrows me with fear and wonder.
Bernardo:
It would be spoke to.
Marcellus:
Question it, Horatio.
What is the most likely meaning of the word mark in this scene?
a) sign
b) notice
c) shoot
d) write