The History of Mercury Can Be Summarized as

The history of Mercury can be summarized as

A) mostly volcanic activity and crustal deformation; the only craters to survive were formed within the last billion years.
B) thin crust forming at first, followed by extensive bombardment, the craters from which were then covered by lava flows that produced extensive lava plains between the remaining craters.
C) early cooling to form a thick crust, with no evidence of volcanism or lava flows at any time.
D) rapid cooling to form a thick crust during the early bombardment, with a few isolated lava flows and very dense cratering everywhere else.