The correct answer is C. The pronoun “she” is used when describing the thoughts of Lizzie.
Step-by-step explanation:
In stories, novels and most of the literary works the point of view is the voice or type of narrator that tells the events in a story, the most common points of view include first-person point of view in which the events are told using the pronoun "I"; second-person point of view in which the narrator uses "you" and third-person point of view in which the events are told from an outsider and therefore only the pronouns "she", "he" and "they" are used.
In the case of the excerpt presented the line " Lizzie looked at him for a long time, tilting her head to one side as if trying to figure him out—which was what she was doing", shows the narrator uses the pronouns "she" and "he" along with different grammatical forms of these to tell the events of the story and refer to the characters, especially to the main character Lizzie, which shows the point of view is a third-person point of view. Considering this, it can be concluded the line shows the story is told from the third-person point of view because "the pronoun “she” is used when describing the thoughts of Lizzie".