Answer:
∠JCL
Explanation:
Complementary angles are angles which measures add up to 90°.
From the diagram you can see that angle JCT is right angle, right angle has the degree measure of 90°.
Also from the diagram
∠JCL+∠LCT=∠JCT
So
∠JCL+∠LCT=90°
This means angles JCL and LCT are complementary.