N this graph, which transformation can produce quadrilateral A′B′C′D′ from quadrilateral ABCD? a translation 4 units down and 3 units to the left

a reflection across the line y = x

a reflection across the line y = -x

a 180° counterclockwise rotation about the origin

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted