The answer is D. Hope this helps you.
What is the world's population ? Currently, it's 7.4 billion. So 1/10th of the world's population would be 740 000 people.
There are two countries in this Plain: Bangladesh (150 million) and Pakistan (180 million) - that's in total 330 million.
Also, numerous Indian states are in this plain: Uttar Pradesh (200, 630 million so far), Bihar (100, that makes 730), Haryana (30 million, so we already have 760 million)
So the answer is true, and likely it's a little more than one tenth.
B. through the Treaty of Paris, at the end of the Seven Years’ War
