Which statement is the inverse of the conditional statement: If point B bisects line segment AC into two congruent segments, then point B is the midpoint.

If point B is the midpoint, then point B bisects line segment AC into two congruent segments.
If point B is not the midpoint, then point B does not bisect line segment AC into two congruent segments.
If point B does not bisect line segment AC into two congruent segments, then point B is not the midpoint.
Point B bisects line segment AC into two congruent segments if, and only if, point B is the midpoint.