Animal ethologist conducted classic studies of imprinting among newborn goslings.

That would be Konrad Lorenz, the father of the modern research on the animal behavior that is the father of the modern ethology, who lived from 1903 to 1989.  He was awarded the Nobel Prize for Physiology or Medicine in 1973. He is famous for his work on imprinting, the phenomenon that the newborn nidifugous birds within the first few hours of their lives bond with the first moving thing they lay their eyes on.  

the correct answer is "c": the pillars proclaimed his regret at the bloodshed at the battle of kalinga and his conversion to buddhism.

the kalinga war is considered as one of the largest battles in the history of india. it was fought between the between the maurya empire, which ruled the lands of what is now known as india at the time, and the independent feudal kingdom of kalinga.

the army of maurya empire, led by its king ashoka, fought a prolonged war against kalinga. the war ended around 262 bce with the victory of the maurya empire. it is believed that ashoka, after having witnessed the loss of many lives during this war, felt deep responsibility and eventually converted into buddhism.