The aspect of of instruments that improved during the Romantic period was the valves. The correct answer is D, valves.
Answer:
The song was inspired, first and foremost, by the deaths of musicians Buddy Holly, Ritchie Valens and J.P “The Big Bopper” Richardson in a plane crash on Feb. 3, 1959 – the “day the music died,” according to the song. (McLean was a 13-year-old paperboy at the time and mourned their deaths greatly.)
Explanation: