62. D) It profits by selling its user’s personal data.

63. C) They don’t know their personal data enriches Facebook.

64. C) To render better service to its users.

65. B) Formulating regulations for social-networking sites.

66. C) He doesn’t want his personal data abused.

点评：

文章的主题围绕当下很受欢迎的社交网站Facebook，揭露其将用户资料出售给广告商。而大多数用户并未意识到这一点，因为他们并没有意识到个人资料的重要性。作者的态度和立场非常鲜明，并表示考虑注销自己的账户。