Please Britain profited the most from India by: Britain exploited the Indian people and enslaved them. Britain extracted valuable mining materials Britain took over spice plantations. Controlling trade throughout the area and developing a lucrative opium trade in China.

The answer is Controlling trade throughout the area and developing a lucrative opium trade in China.

Explanation:

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

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