In paragraph 87, Mr. Steward returns the button unit to the Lewis home after his phone conversation with Norma. How does this action affect the Lewises?

A. It encourages Norma to consider using the button unit.
B. It makes Arthur think about the advantages of the button unit.
C. It makes Norma and Arthur suspect Mr. Steward is a criminal.
D. It encourages Norma and Arthur to think of ways to improve their life