CL because when one shape is similar to another shape, the way they are named is where they are similar.
what i mean by that is since the problem says LMC is similar to BJK then m
So because you’re given the information that triangle BJK’s segment KB is similar to another segment of triangle LMC, using our knowledge about similar angles, we know if angle B is similar to angle C, and angle K is similar to angle C, then segment KB must be similar to segment CL.
also if it’s easier to trace the similar angles, i recommend that too! (i.e. highlight the similar angles like L and B, M and C, etc)
always remember the way similar triangles are listed is concurrent with which angles are similar too.