Although jazz was born in the South (most think New Orleans), later innovations to the form took place in cities outside the South. True. Musical innovations like the banjo, a fingerpicking guitar playing style, and musical styles like ragtime, blues, and jazz originated with... black musicians.
To prevent blacks from voting in the late 1880s through the 1910s, some states passed disfranchising laws that instituted literacy tests, complicated questions, and poll taxes as a rite of passage to register to vote, essentially taking the vote away from all but a handful of African Americans. True.