2- The correct statements about the holiday honoring Martin Luther King Jr are:
-It was first celebrated as a federal holiday in 1986.
-Many states did not celebrate the holiday for up to 15 years after it was formally adopted.
-Some senators opposed the holiday because they claimed King worked with Communists.
In conclusion, all answers are correct.
3- Before their union was recognized, car porters had to work unpaid hour before and after the train was traveling, both for "preparing" and "cleaning" tasks.
4- Women, such as Sojourner Truth, were not fully satisfied with the Fifteenth Amendment, because it granted the right to vote to all men, but not to women.
5- The Southern Christian Leadership Conference chose to protest in Birmingham, Alabama, in 1963, because it wanted to provoke harsh treatment by Bull Connor, the town’s commissioner of public safety.
The Birmingham campaign was a model of non-violent protest and confrontation, and through the media, it drew the world's attention to racial segregation in the south. This gave relevance to King's reputation, toppled Connor from his post, eliminated segregation in Birmingham and opened the way directly to the Civil Rights Act of 1964, which prohibited racial discrimination in the hiring of public and private services in all the United States.
6- People in African American neighborhoods who are denied mortgages and loans at a bank, despite having a good financial background, are victims of redlining.
Redlining is a discriminatory practice of denying or limiting loans to people in specific geographic areas. The term Redlining was coined by the sociologist John McKnight in the 1960s in reference to the practice of red-line delimiting the areas in which banks were to avoid investing.