Question

Which of the following is MOST needed for cosmologists to study the age of the universe? A. Energy levels B. Static C. Size D. Distance traveled

Answer 1

The last person is wrong, I just took the test and the correct answer was: B.Static

Answer 2

i think the one that is most needed for cosmologist to study the age of the universe is : D. distance travelled
It is used to determine the Hubble constant today and extrapolating back in time with the observed value of density parameters

Hope this helps