Question
In Chapter 1 of The Hobbit, why is Bilbo startled by Gandalf's first visit?
Responses

Gandalf says he will be sending Bilbo on an adventure.
Gandalf says he will be sending Bilbo on an adventure.

Gandalf sets off fireworks in Bilbo's meadow.
Gandalf sets off fireworks in Bilbo's meadow.

Gandalf scratches a mark on Bilbo's door.
Gandalf scratches a mark on Bilbo's door.

Gandalf demands an invitation to tea the following week.