The Inca Empire, or Inka Empire (Quechua: Tawantinsuyu), was the largest empire in pre-Columbian America. The administrative, political and military center of the empire was located in Cusco in modern-day Peru. The Inca civilization arose from the highlands of Peru sometime in the early 13th century.
The correct answer is B) He committed to a principle of nonviolence.
What was a result of Asoka's conversion to Buddhism was that he committed to a principle of nonviolence.
Let's have in mind that Asoka had been a fierce and violent warrior and Emperor. He showed no mercy to his enemies.
However, after so much pain and destruction caused in war, he changed.
Asoka imitated the Buddha principles and started to meditate beneath a tree.
Emperor Ashoka decided to convert to Buddhism because one day he realized the damage he had created to other people during the Kalinga War. He felt remorse and he changed his life. He found peace in the teachings of Budha and considered it beneficial to all humans and animals, to the degree he ordered to build many temples or stupas.
C) populism
For future reference: an easy way to remember the causes is to use the acronym MAIN (as in the MAIN causes) to remember that they are militarism, alliances, imperialism, and nationalism.
Hope this helps :)