Why is the excited hydrogen gas glowing red? Choose one: A. Hydrogen gas absorbs blue light and reemits it a direction away from Earth, leaving the remaining light observed from the gas to be red. B. All gases, like hydrogen gases, appear red when excited. C. Because of its atomic structure, hydrogen gas has a transition between excited states that produces red light. D. The nebula actually appears red because of a lot of other gases blended within the hydrogen gas