How do scholars know that the Indus Civilization probably had sea-going vessels?

Evidence of seals and other objects in other regions.

Explanation:

Archaeologists have played a vital role in finding past by excavating for artifacts. The presence of sea-going vessels in the Indus Valley civilization indicates the artifacts that have found different civilizations like Mesopotamia and China. Some of the goods traded like beads,  pearls, gold, silver, terracotta pots, turquoise, lapis lazuli, metals, flints, and seashells.  

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.

i truly dont know the answer wait i do its 1,3,4