It serves as a person place thing or idea. noun clause can do the exact same thing a normal noun can do
Well D and A couldn't be it so I think it'd either be C or B. Honestly I think it is most likely to be C.
Answer: The 1964 Civil Rights Act was Congress's most expansive civil rights law ever passed. It included systematic steps to abolish segregation in Jim Crow and counter racial discrimination. The 1965 Voting Rights Act eliminated obstacles to black francs in the South, prohibiting poll taxes, literacy tests, and other initiatives that essentially prohibited African Americans from voting. Segregationists sought to prohibit the state level from enforcing federal civil rights legislation.
poor or similar word choice. such as using the wrong they, they're, their is the most common typo