The correct answer is A. Refuse to vote in elections. The congress for national Indian was based in political party in India.
The national Indian congress was the first nationalist modern movement which emerged in British empire which was found in Africa and Asia.
The congress became an Indian independent movement under Mahatma Gandhi who was the principal leader.
The congress successfully influenced anti-colonial nationalist movement which founded in British empire.
This congress is termed as the centre left of Indian politics.