what will be evidence of a galaxy moving toward earth? A. The galaxy has a loose, disorganized appearance b. the stars in the galaxy appear to twinkle . C. THE GALAXY APPERS TO BE ACCELERATIN. D. THE LIGHT WAVELENGHTHS COMING FROM THE GALAXY ARE BECOMING SHORTER

Choice D). is on the right track, but it's stated incorrectly.The wavelengths of light coming from a galaxy that's moving toward us are shorter than they were when they left the galaxy.  When we see them, they're shorter than they should be. (This is called a "blue shift" in the spectrum of the galaxy, because blue is the short-wavelength end of the spectrum of visible light.  If the wavelength of somelight somehow becomes shorter, then the color of the light changes toward the direction of blue.)If the source of light is moving toward us, then the wavelength we see is shorter than it should be.  If the source is moving away from us, then the wavelength we see is longer than it should be.  The whole trick to this is knowing what the wavelength of the light we see should be !