The answer would be A-they had many natural resources
Here is some more information: India had useful resources that the British needed. Also, they took control so the Dutch or French could not attack west India via the Red Sea. The Suez canal was called the "lifeline of their emipre" as it was the most important route for the British to access their colonies in Asia and Africa.
Have a great day/evening/night! :) Let me know if you have any additional questions! -Kappifilms