(02.03 mc)

the figure shows two triangles on a coordinate grid:

what set of transformations is performed on triangle abc to form triangle a'b'c'?
a.. a 180-degree counterclockwise rotation about the origin, followed by a translation 5 units down
b. a translation 5 units down followed by a 180-degree counterclockwise rotation about the origin
c. a 270-degree counterclockwise rotation about the origin, followed by a translation 5 units to the right
d. a translation 5 units to the right, followed by a 270-degree counterclockwise rotation about the origin