Discussion
Which of the following statements are true in the reference of "All Expert" service ?
(i) It is an e-mail reference service
(ii) It covers all subjects
(iii) It is free service
(iv) It is fee based service
Answer: A
Statements (i), (ii) and (iii) are true, so the answer is (i), (ii), (iii) are correct.
AllExperts was one of the first large question-and-answer services on the web: a user put a question to a volunteer expert chosen from a list covering virtually every subject, and the answer was sent back by e-mail. Because the experts were volunteers, the service was free to the person asking.
That makes statement (iv), fee based, the false one, and every code that includes (iv) is wrong. Statements (iii) and (iv) contradict each other, so no correct code can contain both.
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