A. 16.5 billion years
B. 15.5 billion years
C. 13.5 billion years
D. 14.5 billion years
Submitted by: Kashif Ashraf
Correct Answer: 13.5 billion years ✔
Last Updated: June 17, 2018
A. 16.5 billion years
B. 15.5 billion years
C. 13.5 billion years
D. 14.5 billion years
Submitted by: Kashif Ashraf
Correct Answer: 13.5 billion years ✔
Last Updated: June 17, 2018