Concept:
After returning from South Africa in 1915, Mahatma Gandhi led several localized movements that established his leadership style before he transitioned to national-scale movements.
Step 1: Verifying Gandhi's Personal Leadership.
• A. Champaran Satyagraha (1917): Gandhi's first major civil disobedience in India, fought for indigo farmers in Bihar. (Correct)
• B. Kheda Satyagraha (1918): Gandhi led this for peasants in Gujarat who were unable to pay taxes due to crop failure. (Correct)
Step 2: Analyzing Errors and Exclusions.
• C. Calcutta Mill Strike: There was a famous Ahmedabad Mill Strike in 1918 led by Gandhi, but "Calcutta Mill Strike" is not a recognized milestone of his early activism. (Incorrect)
• D. Bardoli Satyagraha (1928): While Gandhi supported it, this movement was primarily led and organized by Sardar Vallabhbhai Patel, which earned him the title 'Sardar'. (Excluded in the context of Gandhi's primary early activism).