Four people were discussing the age of a writer. A said, "She won't be over 35. " B said, "She's not over 40. " C said, "She's under 50. " Ding said, "She Absolutely over 40. "Actually only one person was right. Then the following statement is correct ______. ['A is right.', 'She is between 45 and 50 years old.', 'She is under 50.', 'Ding is right.']