Final answer:
Nineteenth-century musical nationalism was focused on expressing the regional traditions of a composer's 'people'
Step-by-step explanation:
The concept of nineteenth-century musical nationalism refers to the intent of a composer to express the regional traditions of his or her 'people.' This period saw composers focusing on their own countries, producing music that strongly represented their nation's identity. It was not about embracing all cultures, but rather about showcasing their own cultural heritage.