27 Which of the following statements is true?
(A)Lonely people know how to interact with other people.
(B)The elderly are among the loneliest people because their kids have left them.
(C)Lonely people are not necessarily alone； loneliness is a psychological condition.
(D)Unrealistic expectations are needed to establish meaningful contact with others. 

選項(C)要看整段文才是答案

Other surveys showed that (A)lonely people know and interact with other people as the non-lonely do, but the lonely tend to have (B) unrealistic standards or expectations about the relationships that get in the way of forming close friendship. Surveys have shown the loneliest people tend to be adolescents and young adults. Contrary to popular belief, (D)the elderly are less lonely than people in other age groups, perhaps because the elderly have more realistic expectations.