Hot Gas Created During the Big Bang Should Be Detectable

Hot gas created during the big bang should be detectable becausethe ____.

A) gas has traveled with galaxies as they formed and is spread through the Universe of the present day
B) big bang occurred everywhere at once, and should be visible in any direction at long look-back times
C) big bang occurred in a certain location, and the radiation from the gas is concentrated there
D) gas has travelled to the edges of the Universe and will be visible at negative redshifts
E) radiation emitted by the gas has travelled at the same speed as the expanding Universe and is visible all around us