Answer :
Final answer:
Antonín Leopold Dvořák is the composer who celebrated American and Czech spirits, incorporating elements of Native American music and African American spirituals into his works, most notably in his 'New World Symphony'. The correct option is (b).
Explanation:
The composer who celebrated both American and Czech spirits, drawing inspiration from Native American music and African American spirituals, is Antonín Leopold Dvořák (1841–1904). Dvořák was a Czech composer who, during his time in the United States, was influenced by the musical traditions he encountered. His most famous work in this regard is Symphony No. 9 in E Minor, also known as the 'New World Symphony', which incorporates elements of Native American music and African American spirituals. This connection illustrates Dvořák's belief that American composers should develop a distinctive style of their own by embracing their country's diverse cultural heritage. His works are celebrated for their melodic richness and nationalistic themes, successfully blending the music of different cultures.