Question

what is the kings main concern when he finds out that polonius has been killed? why does he decide to turn to his \wisest friends\?
that fortinbras will invade and kill him; he needs to know how to stop it
he worries how he will explain the murder to the public without looking bad; needs p. r.
he worries about the wrath of laertes; laertes will kill claudius at any cost
that the queen will leave him; he needs their help to stay in power

Explanation:

In Hamlet, after Polonius's death, King Claudius's primary fear is Laertes (Polonius's son), who has a large following and will seek violent revenge for his father's murder. Claudius turns to his "wisest friends" to strategize how to handle Laertes's rage and protect himself from being killed by Laertes. The other options do not align with the play's plot: Fortinbras's invasion is a separate later concern, the public explanation is not his immediate worry, and the Queen leaving him is not the core issue here.

Answer:

Green: He worries about the wrath of Laertes; Laertes will kill Claudius at any cost