according to our current understanding, giant elliptical galaxies form: a.by the merger (or swallowing) of a number of smaller galaxies in a cluster of galaxies b.by watching too much football and drinking too much beer c.by being located near the center of the big bang explosion and thus getting a major early push d.when a black hole swallows enough material so that most of the stars in the galaxy are inside the black hole, leaving only a thin halo e.only in the giant voids that astronomers are discovering among the filaments and chains of galaxies