What is the measure of ∠KML, and why?

Select one:
a. y over 2 , because Triangle JHK is congruent to triangle LMK
b. y + 50 degrees, because Triangle JHK is similar to triangle MLK
c. 115 degrees - y, because Triangle JHK is congruent to triangle LMK
d. y, because Triangle JHK is similar to triangle LMK