What Is the MOST Likely Cause of the Smooth and Relatively

question 151

Multiple Choice

What is the MOST likely cause of the smooth and relatively crater-free surfaces of lunar maria?

• A) Volcanic ash rained on the surfaces of the basins in recent geological times, covering previous craters.
• B) The lava in these basins flowed in the relatively late geological history of the Moon, after the period of major bombardment.
• C) Dust storms had eroded and smoothed the surface earlier in the Moon's history.
• D) Smoother sediments were left behind after water had flowed into the basins and evaporated away.