单选题

“Small talk”, as interpreted by the author, ______.

A has no real function in communication at all

B is usually meaningless and therefore useless

C is not as idle as it may seem to be

D is restricted to certain topics only

解析：
第四段的最后写到“But you should know that small talk actually has a big place in our lives(但是你要知道这样的琐谈在我们的生活中具有重要的地位。)”。再从整篇文章来看，琐谈的确能起到很重要的作用，例如将交谈双方引入一些更重要的谈话或者是打破冷场的局面。这与C项表述一致。A、B两项曲解了文意。D项“琐谈的话题有严格的限制”，与文章倒数第二段第一句“琐谈的主题并不重要”相悖。故选C。