Mr. Winter asks her to babysit even though she has never seen him before; this unusual approach is a clue that something is off concerning the Winter family.
Answer: Option D.
Step-by-step explanation:
In the story, Charles is babysitting the baby of Winter family. But she is confused about the fact that why has she been asked to babysit the baby belonging to this family.
She was confused because she ad just met Mr Winters at some club and he asked her there and then to babysit his baby which led to her confusion about this because they hardly know who she is. This shows that there is something strange.