Which sentence states a property or a definition used in the construction of a perpendicular bisector?
a) a line that intersects a line segment at an angle of 90° is parallel to the line segment.
b) a line that bisects a line segment is necessarily perpendicular to the line segment.
c) any two points equidistant from the midpoint of a line segment lie on its perpendicular bisector.
d) any point on a perpendicular bisector is equidistant from each endpoint of the line segment.