Trapezoid abcd is congruent to trapezoid a"b"c"d" . which sequence of transformations could have been used to transform trapezoid abcd to produce trapezoid a"b"c"d" ? a. trapezoid abcd was reflected across the y-axis and then across the x-axis. b. trapezoid abcd was reflected across the y-axis and then translated 7 units up. c. trapezoid abcd was translated 7 units up and then 12 units left. d. trapezoid abcd was reflected across the x-axis and then across the y-axis.