Final answer:
Mildred refuses to discuss Clarisse and other deep topics because of the society's discouragement of individuality and reflection, and her inclination to conform to superficial norms, which includes avoiding controversial subjects like books.
Step-by-step explanation:
In the context of the book "Fahrenheit 451," Mildred refuses to talk about people who are dead, including Clarisse, because the society they live in discourages deep thinking and emotional connections. Mildred's refusal to engage in the discussion with Montag likely stems from a combination of a societal-induced apathy toward individuality and deep topics (b), her comfort in conforming to the superficial norms of her society, as well as a potential avoidance of the controversial subject of books (d). Unlike Clarisse, who was curious and inquisitive about the world, Mildred is deeply entrenched in the shallow, media-saturated society that condemns the type of reflective thinking Clarisse exemplified.