The "Dark Age" in the Indian Empire was a period known for a series of rebellions that occurred against the ruling Kushanas. This happened due to the lack of legitimacy by them during the beginning of the 4th century. This created many small kingdoms within the provinces of India and fractured the empire. A lot of unregulated commerce happened during these provinces and there was little to no control by the Empire.
However, when Samudragupta rose to power, he started a campaign to unify the territories of India. Gradually annexing province by province as he went through them. This brought order as the trade was now regulated by one only entity which was the Empire.
Answer:
to ensure higher quality people
A unitary government gave them too much power to the states
It would be all of these. During world war 2 it is the United States that supplied almost everything in the allied war effort. Also the United States take longer route and also a hard campaign to combat the German U-boat for supremacy and stable supply route for the allied forces.
