By late adolescence, cognitive changes enable teenagers describing themselves to a. focus mostly on their positive personality traits b. avoid the use of qualifiers and social virtues c. place less emphasis on personal and moral values d. combine their traits into an organized system

I believe the answer is: D. combine their traits into an organized system

At this period, they would started to analyze their own capability and potential. After that, they develop future planning on how to utilize this capability for their benefit. This would allow them to be able to find out their true passions and their final goals in life.