Since this is a paradox question, the correct answer needs to point out where does the contravercy stem from. If you view D individually, it SUPPORTS the part of the argument where it says that TALLER stools will keep customers staying longer at the restaurant; but it also weakens the part of the argument where it says that the restaurant wants to increase the turnover rate. With D alone, we still do not know if the argument is weakened becasue D is a double-edged sword.
C on the other hand, points out the contraversy within the original argument like the Chinese Spear-and-Shield story.
-- by 会员 sdcar2010 (2011/4/7 12:56:08)