Which sequence of transformations could have been used to transform rectangle abcd to produce rectangle a"b"c"d" ? rectangle abcd was translated 2 units left and then 3 units down. rectangle abcd was rotated 180° around the origin and then translated 7 units down. rectangle abcd was reflected across the y-axis and then across the x-axis. rectangle abcd was translated 8 units left and then 7 units down.