Which of the Following Explanations Is the Most Informative

Which of the following explanations is the most informative?

A) Your bedtime will be 10 p.m.because I said so.
B) The city adopted a $6 million tax increase because the council thought that it was for the best.
C) The earth has an elliptical orbit around the sun because the other planets have elliptical orbits as well.
D) Levels of air pollution have been increasing in Asia because there are greater quantities of pollutants in the air.
E) Fishing at Upper Mill Lake was restricted because fish populations in the lake were declining.