The author of the passage is primarily concerned with A. explaining the influence of the development of the pianoforte on the music of Beethoven B. describing Temperley's view of the contrast between the development of piano music in England and the development of piano music elsewhere in Europe C. presenting Temperley's evaluation of the impact of changes in piano construction on styles and forms of music composed in the era of the London Pianoforte school D. considering an alternative theory to that proposed by Ringer concerning the London Pianoforte school E. discussing the contribution of Temperley's anthology to what is known of the history of the London Pianoforte school