Which sentence is not written in an appropriately formal, academic language? A) A lot of the words in the book are crazy, man, and, like, so not-cool looking at those words from today. B) The African author, Chinua Achebe, wrote a famous essay arguing that Conrad's novel is incurably racist and should not be taught. C) The novel Heart of Darkness by Joseph Conrad has remarkable staying power in English curriculums for a book written in 1899. D) Joseph Conrad actually wrote the novel Heart of Darkness in his fourth language, English--after Polish, Russian, and Ukrainian.