Which two sentences in the passage are grammatically correct? Mahatma gandhi was the most important leader in Indias history

Gandhi was committed to nonviolence, and he was determined to win freedom for his country without violence or confrontation, if possible.

He called it nonviolent noncooperation, and it proved to be one of the keys to India's independence from Great Britain.

He called it nonviolent resistance, but the results were the same.

These two men of peace achieved more than anyone would have thought without ever once resorting to violence.

These are the correct sentences.