Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. It was difficult for some critics in the 1920s to imagine why the idea of sound film had faded from sight well before the First World War. B. As surprising as it seems today, some critics in the 1920s believed that the new attempts at sound films would fade just as quickly as the attempts made before the First World War. C. Though some early critics thought that sound film would fade, its popularity during the First World War proved that it was not simply a technical novelty. D. Although some critics predicted well before the First World War that sound film would be an important technical innovation, it was not attempted until the 1920s.