Which is an example of new material resources likely to be made available to African-American musicians at the close of the 19th century?单项选择题

Textiles and manufacturing equiptment led to a proliferation of performance opportunities as concert halls were newly decorated.

A rise in oil drilling and coal production resulted in easy access to heat, which meant rehearsals often continued through the winter months.

Marching band instruments left in the wake of French colonialism and the Spanish American war, along with increased new production, made a wider range of instruments available to a wide variety of consumers.

The material conditions required for middle-class wealth, in the wake of antebellum reconstruction, helped segregation-era African-Americans amass almost as much wealth as their white counterparts.