The Overall Geography of Mars Can Be Best Summarized as

Multiple Choice

The overall geography of Mars can be best summarized as

A) major volcanoes in the northern hemisphere,extensively cratered plains in the southern hemisphere,and the hemispheres separated by one major valley system.
B) moving lithospheric plates whose motions have produced long,folded mountain chains,deep subduction trenches,and several large rift valleys.
C) smooth plains where continuous resurfacing by ongoing volcanic activity has hidden older impact craters and other details.
D) mostly rolling plains,with several volcanoes on two continent-sized uplands.