Answer:
Option C .a perpendicular bisector
Step-by-step explanation:
We are given a figure that represent a step in a compass and -straightedge construction.
We have to identify which type of construction
When we draw a perpendicular bisector
Then we put the compass on point A' take distance greater than half of A'B' and draw an arc C' and then put the compass on point B' and do not change compass as like in previous step and draw an arc and intersect the arc C'
Then , draw a line passing through of intersection of two arc which is perpendicular and bisect the A'B'.
Hence, given figure represent a perpendicular bisector.
Therefore, option C is true.