In the past 3 billion years the main influence on the lunar landscape has been?

Question

A. meteoride impacts
B. running water
C. volcanoes
D. moonquakes

Answer 1

Meteor impacts.
The moon has never had running water (at least not enough to cause any major geological formations) and there is no evidence of any long-term volcanic activity (the moon's core is cold, so there is no seleno-thermal activity to power volcanoes).
Moonquakes probably occur, but without tectonic plates and a molten mantle they are just jiggles of the solid material.

Answer 2

There aren`t sufficient quantities of water for any effect. Since the moons core is cold there has been no significant volcanic activity. Without these two factors, there will not have been too many earthquakes, and gravity is too low for too much landslide activity. Therefore A. meteorite impact is obviously the only answer. A simple look will present lots of evidence of craters everywhere.

Answer 3

A. meteorites - make all the craters, large and small