Constance is constructing a perpendicular bisector using a compass and a straightedge.

What is the least number of arcs Constance needs to draw to complete the construction?

A1

B2

C3

D4

Katie draws two chords in a circle in a certain way. She then draws in four segments between adjacent endpoints of the chords to form a quadrilateral.

Which of the following is not true about the chords if Katie constructed a square?

AThe chords must both be diameters.

BThe chords must bisect one another.

CThe chords must be perpendicular to one another.

DThe chords must form two acute and two obtuse angles at their intersection.