The population distribution of Canada and the United States is similar because most of the population is concentrated — a along the border
b near the coastlines
c in large urban centers
d throughout the Great Plains

Correct answer is C. in large urban centers

Explanation:

First option is not correct as although most of the population in Canada is located near the border, that is not the case with United States.

B is also not correct as while in United States we have large cities on the coast like Boston of Los Angeles, that is not the case in Canada.

C is correct as most of the population is distributed in the large megapolis, such as Montreal, Toronto, New York, Los Angeles...

D is also not correct as not so many people is living in that area in contrast to other regions.