How did the executive court help black Americans vote

After years of activist lobbying in favor of comprehensive civil rights legislation, the Civil Rights Act of 1964 was enacted in June 1964. Though President John F. Kennedy had sent the civil rights bill to Congress in 1963, before the March on Washington, the bill had stalled in the Judiciary Committee due to the dilatory tactics of Southern segregationist senators such as James Eastland, a Democrat from Mississippi.^1  

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start superscript, 1, end superscript After the assassination of President Kennedy in November 1963, his successor, Lyndon Baines Johnson, gave top priority to the passage of the bill.

The Civil Rights Act of 1964 contained provisions barring discrimination and segregation in education, public facilities, jobs, and housing. It created the Equal Employment Opportunity Commission to ensure fair hiring practices, and established a federal Community Relations Service to assist local communities with civil rights issues. The bill also authorized the US Office of Education to distribute financial aid to communities struggling to desegregate public schools.^2  

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After a coalition of religious groups, labor unions, and civil rights organizations mounted an intense grassroots effort to lobby support for the bill, the Senate finally passed it on June 11, by a vote of 73 to 27.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.