What were two factors that lead to jazz being the primary musical medium of popular culture in the early 20th century?

Ragtime's popularity waning and blues thriving as a separate genre.

Explanation:

the decreasing neutrality of the u. s. in world war i

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affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts