The correct answer is: B) Lower castes.
The Vaikom Satyagraha was a nonviolent protest that took place in Kerala, India, from 1924 to 1925. The protest was led by Mahatma Gandhi and other Indian independence activists, and it was aimed at ending the practice of untouchability, which barred members of lower castes from entering Hindu temples. The protest was successful, and it led to the opening of temples to all Hindus, regardless of caste.
The other options are incorrect. Option A is incorrect because the Vaikom Satyagraha was not specifically about women’s rights. Option C is incorrect because the Vaikom Satyagraha was not specifically about the rights of non-Hindus. Option D is incorrect because the Vaikom Satyagraha was not specifically about the rights of people with disabilities.