The exchange that most affected the indigenous people was the one of diseases. Native Americans hadn't encounter the diseases the European brought before, so they hadn't develop immunity to them. This is the major reason of the large death of Native Americans, besides the war between them and the brutality of the Europeans.
One primary cultural effect of the sheet music published in Tin Pan Alley was to: "offer job opportunities in the arts to African American musicians."
- This is evident in the fact that the Tim Pan Alley musicians sang songs that promote the mentality of the United States citizens.
- Their songs also assist in reducing the racial and national tensions, especially people of African American descent.
- The stage called the vaudeville at Tim Pan Alley was famous for promoting the struggle of African Americans.
Hence, in this case, the correct answer is option C "offer job opportunities in the arts to African American musicians."
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