Answer:
Answer Choice A
Explanation:
If the narrator is "all-knowing", then it means that he has access to all forms of dialouge.
Meaning
Karli's feelings are shown,
Anxious, Nervous, Worried, etc.
And so are her brother's!
Confident, Knowing, Reasurring-Type-Mood
Which means that A is the correct answer! :D
Now give me cake NOW! ROARRRR!!!!!!!!