Answer:
The correct answer is D. piano.
Step-by-step explanation:
The piano was a significant musical instrument that helped bridge the gap between jazz and the Harlem style of music. Pianists like Duke Ellington and Fats Waller played a vital role in developing the sound of Harlem stride piano, which blended jazz and classical music styles. The piano was also a central instrument in big band jazz, which became popular during the Harlem Renaissance. While banjos, synthesizers, and electric guitars have all been used in jazz and various music styles, the piano has had a unique role in shaping the sound of the Harlem Renaissance.