Answer:
Correct answer is a) in the eastern region.
Step-by-step explanation:
A is the correct answer because all larger cities are located in the eastern part of the country, including Beijing, Shanghai and many others, that are near or on the Pacific ocean.
B is not correct as deserts in the country are mostly not inhabited.
C is not correct as China doesn't have such a large number of islands.
D is not correct as there aren't so many inhabited areas in the continental part of the country.