What is the tone of the story

A．If the transport is between a town and the airport.
B．If a passenger wants to catch a plane.
C．If a passenger has just finished the air trip.
D．If a passenger is at town terminal.

A．Because they can attack without warning just like bears.
B．Because they are used to give warnings to visitors about bears.
C．Because they are as funny as stuffed bears.
D．Because they are used to show the oddness of the stuffed bears.