The answer is A, 4.6 billion years old. The solar system was obviously formed after the big bang, and using the big bang theory and the birth of our sun, projections show that our solar system is at most 4.6 billion years old.
Answer:
The two rift valleys lined by mountains and plateaus.
Explanation:
The two rift valleys lined by mountains and plateaus.
Mars (diameter 6790 kilometers) is only slightly more than half the size of Earth (diameter 12750 kilometers).
The answer is C and A (I think.)
Gl.
