Radiometric Dating Is a Technique Used to Determine the Age

Radiometric dating is a technique used to determine the age of rocks.Geologists have used this technique to determine that

A) Earth is about 6.2 trillion years old,and life appeared on Earth about 4.9 trillion years ago.
B) Earth is about 4.6 billion years old,and life appeared on Earth about 3.4 billion years ago.
C) Earth is about 4.6 million years old,and life appeared on Earth about 4.4 million years ago.
D) Earth is about 6.2 thousand years old,and life appeared on Earth about 6 thousand years ago.

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