Step 1: Eliminate other movements:
Non-cooperation (1920-22) centred on boycott, not salt-making; Quit India (1942) came over a decade later; the Kheda movement (1918) was a local peasant satyagraha.
Step 2: Confirm:
Only the Civil Disobedience Movement is directly inaugurated by the Dandi March.
Final Answer:
\[ \boxed{\text{Civil Disobedience Movement}} \]