Answer: C. loneliness and isolation.
Explanation: The themes that are common in Carson McCullers's works are loneliness and isolation. Carson McCullers was an American writer who wrote most of her works in the 1940s. The stories took place in the South of the United States. Her characters were isolated and lonely people. They were mostly homosexuals and social outcasts. There is existential angst in her characters who cannot find true relationships with other human beings.