Http://www.lcps.org/cms/lib4/va01000195/centricity/domain/4153/study%20guide%20-%20geography%20unit%201%20answer%20key.pdf
The Salt Strike was the most aggressive revolt of the Indian National Congress. The correct option among all the options that are given in the question is the first option. This was actually a civil disobedience movement in a non violent matter. This is also an important movement in the history of India.
The answer is D. Scientific Law
