The answer is D.
Traditionally, the groups characterized as untouchable were those whose occupations and habits of life involved ritually polluting activities, of which the most important were (1) taking life for a living, a category that included, for example, fishermen, (2) killing or disposing of dead cattle or working with their hides for a living, (3) pursuing activities that brought the participant into contact with emissions of the human body, such as feces, urine, sweat, and spittle, a category that included such occupational groups as sweepers and washermen, and (4) eating the flesh of cattle or of domestic pigs and chickens, a category into which most of the indigenous tribes of India fell.
By far the greatest factor that characterized the red scare was a deep and often impractical fear of communism within the United States, since communist nations were seen as a threat to the economic prosperity and freedom of the United States.
Lucius Cornelius Sulla the Roman dictator was the one responsible for the dramatic changer in Roman consitution. Sulla's politics was rather conservative, and Sulla had an objective to strengthen the Roman Senate and reduce the power of the plebeian tribunes. He retired in 79BC.
