It was the "<span>d. Southern Christian Leadership Conference" that King helped found in 1957, which had a profound and wide-reaching impact on the Civil Rights movement. </span>
Image shows black people voting, so the amendment to the US constitution that directly guarantees the right shown in that image is 15th. 15th amendment of the united states constitution granted the right for citizens to not be denied their right to vote by states or federal government based on their race or color.
Made government less centralized
The correct answer to this open question is the following.
We are talking about the Gulf of Tonkin Resolution. This resolution changed the rules of war as outlined in the U.S. constitution. With this resolution, the US Congress granted the President of the United States -in this case, Lyndon B. Jhonson- unlimited powers to stop communism in Vietnam. After the aggression of two US navy vessels stationed in the Gulf of Tonkin, Congress passed the resolution on August 7, 1964. From this point on, the US Army committed to total support of South Vietnam in the Vietnam War.