What is ab in the figure
a. none of the above
b. a median
c. an altitude
d. an angle bisector

A. none of the above

Step-by-step explanation:

The line in the picture is not an altitude becaus the altitude of the triangle is measured from the bottom of the base to the highest angle, a median goes from the middle of an angle into the middle of the opposite side, and an angle bisector divides the triangle into two rectangle triangles. so the line in the figure is none of the above.

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .