TOEFL Reading: ETS-TOEFL阅读机经 - J74IH8_P839BKKQGL$

In paragraph 4, why does the author mention a French language paper that was published in Leiden? A. To show that the most successful newspapers in Europe tended to be French-language newspapers B. To illustrate the important role played by the mail in the distinction of newspapers C. To provide evidence that newspapers were being read by the elites of Europe D. To establish that the Netherlands had one of the most effective postal systems in Europe