which kept african americans from nominating candidates for office?\no poll taxes\no literacy tests\no white…

Brief Explanations:

White primaries were Democratic - party primary elections in the South where only white voters were allowed to participate. This effectively kept African Americans from having a say in nominating candidates for office as the Democratic Party was dominant in the region. Poll taxes, literacy tests, and grandfather clauses were mainly used to prevent African Americans from voting in general elections, not specifically from nominating candidates.

Answer:

C. white primaries