6.4 billion years 4.5 billion years 2.8 billion years 1.7 billion years
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The oldest Moon rocks have been dated to a time shortly after the estimated date of the formation of our solar system. Approximately how old are these Moon rocks?
Possibilities:
- 6.4 billion years
- 4.5 billion years
- 2.8 billion years
- 1.7 billion years

4.5 billion years