A parallel sentence mentions the same grammatical expression twice. I would go with "D". 'Passed' and 'Demonstrated' are both past tense words that express the same past tense grammatical idea.
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Answer: By leading the Utilitarian movement.
Explanation: John Stuart Mill is an English phylosopher,known as one the greatest English phylosophers in history,he was born the year 1806. He was the one who led the Utilitarian movement which is known to be a movement concerned about the happiness of the people.
The Utilitarian Theory tries to show that all happiness is very vital for the wellbeing of man,and that all Government actions should be geared towards completly removing pains from the lives of people.
The answer would be c - interjection.
Interjections are words or phrases that express emotion.
Examples would be wow, awesome, ummm, etc.
These are not appropriate for formal writing but used constantly in daily communication.
The answer to your question would be A
