The Opium Wars were a series of wars between Chine and Great Britain. It started when Chine started to refuse the shipments of Opium. The war was a fail for China, this means that answer A, C, and D are wrong. The only answer left is B. Please contact me if you want more information on the opium war.
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The cheap labor in the form of slaves.
Because Indians are not capable of taking care of the land
They shold pay for siding with the British
I think you're answer is correct :) that's what I would have said .
It gave then an efficient way of travel and better communication which allowed products to be transported across the country.