I don’t see the answer choices — but the statements that must be true are:
- $JL = LK$ (L is the midpoint of $JK$).
- Line $s$ is perpendicular to $JK$ (so $s \perp JK$ at $L$).
- $J,\;L,\;K$ are collinear (because $L$ lies on segment $JK$).
- Every point on line $s$ is equidistant from $J$ and $K$ (if $P$ is any point on $s$, then $PJ = PK$).
Explanation
- By definition a perpendicular bisector both bisects the segment and is perpendicular to it. Bisecting means it meets $JK$ at its midpoint, so $JL = LK$ and $L$ lies on the line containing $J$ and $K$. Perpendicular means $s$ meets $JK$ at a right angle.
- The equidistance property is a standard fact: any point on the perpendicular bisector of a segment is the same distance from the segment’s endpoints (can be shown by two congruent right triangles).
If you paste the specific answer choices I can mark which of those match the true statements above.