Answer:
B) Helen Stoner understands that her stepfather is capable of evil acts.
Step-by-step explanation:
The story of The Speckled Band from the Sherlock Holmes series by Arthur Conan Doyle revolves around the death of a young girl Ju lia Stoner. Her twin sister Helen Stoner had asked for Sherlock Holmes' help in figuring out the reason for her sister's mysterious death.
As the story began, Helen had come to Mr. Holmes' home to tell them about her suspicions and help her. She also reveals her step-father's bad temper and the circumstances of Ju lia's death, which tragically is just some days before her wedding. And now that her own wedding is approaching, and made to sleep in her dead sister's room, she fears something will happen to her too. By the middle of the story, we can know that Helen has realized that her step-father is capable of doing evil deeds, even killing a person.
Thus, the correct answer is option B.