Triangle ABC is congruent to triangle . Which sequence of transformations could have been used to transform triangle ABC to produce triangle ? A. Triangle ABC was translated 10 units right and then reflected across the x-axis. B. Triangle ABC was reflected across the y-axis and then translated 7 units down. C. Triangle ABC was reflected across the x-axis and then translated 9 units right. D. Triangle ABC was translated 7 units down and then 9 units right.