input: Text: The logistics of presidential adultery. The Washington Times could hardly contain its excitement: "A former FBI agent assigned to the White House describes in a new book how President Clinton slips past his Secret Service detail in the dead of night, hides under a blanket in the back of a dark-colored sedan, and trysts with a woman, possibly a celebrity, at the JW Marriott Hotel in downtown Washington." For Clinton-haters, Gary Aldrich's tale sounded too good to be true. And it was. The not-so-Secret-Service agent's "source" turned out to be a thirdhand rumor passed on by Clinton scandalmonger David Brock. Those who know about White House security--Clinton staffers, the Secret Service, former aides to Presidents Reagan and Bush--demolished Aldrich's claims. Clinton couldn't give his Secret Service agents the slip (they shadow him when he walks around the White House), couldn't arrange a private visit without tipping off hotel staff, and couldn't re-enter the White House without getting nabbed. (Guards check all cars at the gate--especially those that arrive at 4 a.m.) Even so, the image resonates. For some Americans, it is an article of faith: Bill Clinton cheated on his wife when he was governor, and he cheats on her as president. But can he? Is it possible for the president of the United States to commit adultery and get away with it? Maybe, but it's tougher than you think. Historically, presidential adultery is common
  Question: How did Kennedy make it much more difficult for Clinton to have an affair while in office?
  
   (A) He didn't, as he was a faithful man.
   (B) He was so well known for his affairs that a committee was employed simply to keep an eye on all President's personal lives after he left office.
   (C) Kennedy did not want to think of other presidents having affairs while in office, so he created a protocol for the White House staff to follow from then on.
   (D) After his death, the number of Secret Service agents multiplied exponentially, meaning that the President was virtually never alone.
  Answer:
output: After his death, the number of Secret Service agents multiplied exponentially, meaning that the President was virtually never alone.