The best description of why the Salt March was considered a success is:
The Salt March encouraged thousands in India to practice satyagrah in the fight for the independence of India.
The Salt March, led by Mahatma Gandhi in 1930, was a significant act of civil disobedience that galvanized Indian society and inspired widespread participation in the struggle for independence. It symbolized the fight against British colonial laws and highlighted the effectiveness of nonviolent resistance.