Gandhi's main strategy to win independence from britain was select the best answer from the choices provided. armed warfare careful, directed terrorism peaceful, passive resistance democratic campaigning in britain

Gandhi's main strategy to win independence from Britain was peaceful, passive resistance. 
At the start of Gandhi's career, his campaigns were described as a non-violent mass action or "passive resistance" 
He proposed the main ways in which nonviolent mass action forces political and social change(1) changes hearts and minds; (2) hurts the pocketbook of those whose behavior it seeks to change; and (3) prevents those whose behavior it seeks to change from going about business as usual.