Answer:
C) The least populated areas in China are found in the north and west.
Step-by-step explanation:
The question asks for the conclusion best supported by the map.
A) The Gobi Desert is located in southern China
According to the map, we see the Gobi Desert to the north of China. The map cannot prove this statement.
B) Many mineral resources are located along the East China Sea
First of all, this map shows us the populations of China. Because of that, we are unable to decide whether or not many mineral resources are located along East China Sea.
C) The least populated areas in China are found in the north and west.
As stated above, this map shows the populations in China. The areas found in China on this map are colored grayish-white. According to the map key, this tells is that there are only 0-2 or 0-5 people per km in the area. This means that the least populated areas in China are in fact found in the north and west, making this statement true.
D) Beijing is one of China's busiest seaports.
We see Beijing different than all other cities mentioned in the map. The map key, however, informs us that it means Beijing is the capitol of China. It does not mean Beijing is China's busiest seaports.