Dr. King states that african americans are "still sadly crippled by the manacles of segregation and the chains of discrimination which of these were supposed to have brought an end to segregation by the time Dt. King said these words? Plessy v Ferguson. The equal right amendment brown v. Board of education The civil rights act and voting rights act"

The civil rights act

Explanation:

The Civil Rights Act of 1964 is a Bill that was signed into law after many years of political and civil agitations by the black community against the oppression, segregation and racism they faced over many years in the United States of America.

Therefore, as Dr Martin Luther King states that the African Americans were still crippled by segregation and discrimination which they faced. This was supposed to have come to an end with the passing into law of the Civil Rights Act.

they required less loading and unloading

explanation:

the shipping container improved shipping because it cut down on unloading time by three weeks, eliminated wasted space, and allowed ships to carry.