To show that \( \overline{NO} \) is a constructed copy of \( \overline{PQ} \), Thuy must compare the lengths of the segments. The correct approach is for her to measure the distance from point \( N \) to point \( O \) using a compass and then place the compass on point \( P \) to see if point \( Q \) is the same distance.
So the correct response is:
She must measure the distance from point \( N \) to point \( O \) using a compass and place the compass on point \( P \) to see if point \( Q \) is the same distance.