The correct answer is B) Aunt Martha has both a kind and cruel personality.
What is the allusion to Robert Louis Stevenson’s novel Dr. Jekyll and Mr. Hyde mean in this passage? "Aunt Martha has both a kind and cruel personality."
This can be read in the excerpt when the author writes: "Aunt Martha firmly held his shoulders. She looked very frightening as she growled, “Good boys don’t run down the hall.” Then she straightened his collar and ruffled his hair and, smiling sweetly, said, “Let’s eat pancakes for breakfast.” It was as if nothing had happened."
This means that Aunt Martha had a double personality. One minute she was nice and tender, and instantly she could be cruel with you. That made the other characters to be aware of aunt Martha's moods.
The allusion that is made was to the strange chances of personality in the novel "The Strange Case of Dr. Jeckyll and Mr. Hyde." The allusion means a type of comparison.