一道assumption题

一道怎么也想不明白的题．．．

One sure way you can tell how quickly a new idea-for example, the idea of "privatization"-is taking hold among the population is to know how fast the word or words expressing that particular idea are passing into common usage. Professional opinions of whether or not words can indeed be said to have passed into common usage are available from dictionary editors, who are vitally concerned with  this question.

The method described above for determining how quickly a new idea is taking hold relies on which one of the following assumptions?

A) Dictionary editors are not professionally interested in words that are only rarely used

B) Dictionary editors have exact numerical criteria for telling when a word has passed into common useage.

C) For a new idea to take hold dictionary editors have to include the relevant word or words in their dictionaries.

D) As a word passes into common usage, its meaning does not undergo any severe distortions in the process.

E) Words denoting new ideas tend to be used before the ideas denoted are understood.

答案是选Ｄ哈，可是还是觉得Ｄ也有点不太对的样子．但是其他的选项又也不对．请帮忙指点一下为什么选Ｄ呢？

原文推理有个GAP:the word or words expressing that particular idea (表达particular idea 的词)-----the word or words passed into common usage are available from dictionary editors(使用中的词)