Answer:
Character foils for Fahrenheit 451. Character Foils A lover of life and nature, Clarisse, an affable neighbor who is seventeen, is the foil of Mildred — Montag's cold, mindless, conforming wife. Delightfully human and aware of her surroundings, Clarisse disdains the fact-learning that passes for modern education.
Explanation:
C: Because he made significant discoveries about electricity,
The answer should be D) because A) is not tension, B) is really not tension, and C) is not suspense either so I would go with D) since we don't know what they're talking about and why so quiet.