The correct statement is that the letter of Martin Luther King Jr. represented the state of the nation as under discrimination of races and cultures.
Martin Luther King Jr. was imprisoned and captivated at the Birmingham City jail and wrote a letter to the authorities addressing the situation of the nation.
Hence, in Martin Luther King Jr. letter from Birmingham City jail, he stated the conditions of the nation as under the influence of discrimination on basis of caste, race, gender, etc.
Learn more about Martin Luther King Jr. here: