Which sentence needs a colon to introduce a quotation? A) Some people say that "when life gives you lemons, then you should make lemonade." B) Mother Teresa said that "if you judge people, then you don't have time to love them." C) The soloist closed her eyes and sang, "Blue Moon, I saw you standing alone" in a beautiful alto. D) Martin Luther King's famous speech used two memorable refrains, "I have a dream" and "Let freedom ring."