How did the language of English take the place of German as a lingua franca in Europe? （ ） A: By the 1980s, 95 percent of the oldest specialist journals were written in English. B: Germany’s defeat in the War decreased the number of countries which studied German. C: Several northern European countries downgraded German and upgraded English as a school subject. D: The European Science Foundation's working language is English and so is that of its academic journal.