The correct option is D All of the above
In order to increase their power, the Nadus used to clash with one another and used to join forces against common enemies like the Portuguese and the Dutch. The Swaroopams had their own military. Arisippadijanam of Venadu, Padamalanayanmar of Kolathu Nadu and Lokaru of Nediyiruppu were such armies. By the second half of the 18th century the Sultans of Mysore, Hyder Ali and Tipu Sultan marched towards Kerala and led military campaigns which created frenzy among the Naduvazhis of northern Kerala. Thus, fearing the attack from Mysore Sultans many Naduvazhis and Desavazhis fled to Venadu.