US History: Chapter 8, Exercise 2 — Possible Solution
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QUALIFICATION
It enfranchised 26 million women in principle, but the chapter says three
million women south of the Mason-Dixon line remained disfranchised through
poll taxes, literacy tests and intimidation, and Native American, Asian
American and Latina women faced legal obstacles lasting decades beyond 1920.

REWRITE
"The Nineteenth Amendment barred denying the vote on account of sex, but
discriminatory enforcement kept millions of Black women and other women of
color from voting for years afterward."