Explanation:

One of the biggest reason behind success of CDM was use of traditional means by nationalist leaders to connect masses.

In Prabhatpheris, bands of men, women and children went around at dawn singing nationalist songs, became the rule in villages and towns. Patrikas, or illegal news-sheets, sometimes written by hand and sometimes cyclostyled, were part of the strategy to defy the hated Press Act, and they flooded the country.
Magic lanterns were used to take the nationalist message to the villages. Public meeting also helped in to connect to the masses.
Tying Rakhi was a means of cementing ties during partition of Bengal and part of swadeshi movement.

Hence option (c) is the correct answer.