There were some factors that;s why they didn't unite. They were:
1) Discrimination in Hindu religion on basis of their casts
2) Fight between Hindu & Muslim
3) Many people were afraid as Britishers had weapons
4) They scared 'cause the whole system was in the hand of "East India Company"
Hope this helps!
43% of the u.s. federal government's recipts come from individual income taxes
The answer is B because I just took the test hope I helped ;)