Formal Geometric Constructions Practice Test

Using only a compass and straightedge, a student is constructing the perpendicular bisector of $\overline{AB}$. The student has already drawn equal-radius arcs centered at $A$ and $B$ intersecting at $P$ and $Q$, and then drew line $\overleftrightarrow{PQ}$. Which step is unnecessary for this construction?

A student is constructing the perpendicular bisector of $\overline{AB}$ using only a compass and straightedge. The student draws two circles of equal radius: one centered at $A$ and one centered at $B$. The circles intersect at $P$ and $Q$, and the student draws line $PQ$.

Which statement correctly describes the constructed line?