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

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