I have a little shadow that goes in and out with me,
And what can be the use of him is more than I can see.
He is very, very like me from the heels up to the head;
And i see him jump before me, when i jump into my bed.

The funniest thing about him is the way he likes to grow---
Not at all like proper children, which is always very slow;
For he sometimes shoots up taller like an india-rubber ball,
And he sometimes gets so little that there's none of him at all.

How does a simile most clearly contribute to the tone of this expert from "My Shadow," by Robert Louis Stevenson?

A. The simile "like an india-rubber ball" creates a lively tone because a toy ball is associated with active and entertaining fun.
B. The simile "like proper children" creates a polite tone because children with respectable manners are associated with politeness.
C. The simile "like an india-rubber ball" creates a tall tone because a rubber ball can bounce high in the air.
D. The simile "like proper children" creates a humorous tone because it is ridiculous to expect children to behave properly.