What other explorers contribute to WW expansion?

.Daniel Boone. Daniel Boone crossed the Appalachian Mountains through the Cumberland Gap to Kentucky

.Lewis and Clark. Meriwether Lewis and William Clark, with the help of Native American guides such as Sacajawea, documented the land that was soon included in the Louisiana Purchase

.Zebulon Pike

the answer would be in this answer. someone already asked the question.  

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.