Read the text about Warren Buffet, ignoring the gaps. Which sentence is true: a, b or c? (Đọc văn bản về Warren Buffet, bỏ qua những khoảng trống. Câu nào đúng: a, b hoặc c?) a. Warren Buffet is a billionaire who enjoys spending money. b. Warren Buffet made billions, but has given all his money away. c. Warren Buffet is a billionaire and leads a modest lifestyle.