Which sentence needs a colon to introduce a quotation? A) Mary Poppins likes to claim that she is "practically perfect in every way." B) All of Ralph Waldo Emerson's wisdom can be summed up in one statement: "Be yourself." C) Whenever I say I've never done something, my grandmother always says to "knock on wood." D) While walking near a lake, the poet Wordsworth claims he saw "a host of golden daffodils."