By Dating Moon Rocks,we Can Determine the Moon's Age

By dating Moon rocks,we can determine the Moon's age.How long ago did the Moon form?

A) The maria are about 3.8 billion years old, suggesting that the entire Moon was molten at that time-so that is its probable age.
B) The oldest rocks in the lunar highlands are about 4.3 billion years old, so that must be the age of the Moon.
C) We believe that the Moon was formed molten and then cooled. Since the oldest rocks are about 4.3 billion years old, the formation of the Moon must have occurred around 4.5 billion years ago.
D) Because it cooled and solidified almost to its core, the Moon must be at least a billion years older than Earth. Its age, therefore, must be at least 5.5 billion years.