The answer is D. You're talking Hubble Time which is taken by calculating the reciprocal of the Hubble constant. The Hubble Constant is (about) 70 km/s/Mpc (or 70 kilometers per second per megaparsec).
Note you have a distance / time / distance. We can convert megaparsecs to kilometers and cancel out the distances giving reciprocal seconds. Take the reciprocal of this and you get a figure close to 14 billion years.
This is not how astronomers calculate the age of the universe as the expansion rate is not thought to be uniform but it does give a good approximation of the age of the universe.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.