Which one of the following most accurately states the author's main point? A. Temperley has recently called into question the designation of a group of composers, pedagogues, pianists, publishers, and builders as the London Pianoforte school. B. Temperley's anthology of the music of the London Pianoforte school contributes significantly to an understanding of an influential period in the history of music. C. The music of the London Pianoforte school has been revived by the publication of Temperley's new anthology. D. Primary sources for musical manuscripts provide the most reliable basis for musicological research. E. The development of the modern piano in England influenced composers and other musicians throughout Europe.