It is required to choose from the options which step is a correct step in constructing congruent line segments.
Note that a straightedge cannot be used to draw arcs. Hence, the first choice is wrong.
Also, a compass is not used to join endpoints. Therefore, the second choice is also wrong.
To construct congruent line segments, the length of the line segment is needed. A straightedge is used to measure the length.
Hence, the third choice is a correct step.
