Step 1: Context of Dandi March.
The Dandi March was started by Mahatma Gandhi in 1930 against the British salt tax. It marked the beginning of the Civil Disobedience Movement.
Step 2: Analysis of options.
(A) Non-cooperation Movement: Launched in 1920, not related to Dandi March.
(B) Quit India Movement: Launched in 1942, unrelated.
(C) Civil Disobedience Movement: Correct — launched in 1930 with the Dandi March.
(D) Champaran Satyagraha: Gandhi’s first satyagraha in 1917, unrelated.
Step 3: Conclusion.
The Dandi March was the beginning of the Civil Disobedience Movement.