Which of the statements is TRUE according to the passage?A、The author is already in his 80s.
B、Sumner Redstone chairs Viacom at 53.
C、Sandra Day O’Connor lives no longer than 70 years old.
D、The surgeon general C． Everett Koop is still active as a leader in his 80s.
【正确答案】：D
【题目解析】：事实细节题。由第四段最后一句话可知作者才68岁，A选项不对；由第四段第二句话At 78, Viacom chairman Sumner Redstone jokingly claims to be 53可知B选项不对；由 Supreme Court Justice Sandra Day O’Connor is in her 70s……可知C选项不对；former surgeon general C． Everett Koop chairs an Internet start-up in his 80s可知D选项是正确的。