Your coworker kevin is sitting quietly at his desk. he is obviously upset. to show him empathy, you should a. tell him a funny joke b. offer to pay for his lunch today c. ask him how he’s feeling d. see if his supervisor knows kevin is upset

Empathy is the act of sharing and understanding the feelings of someone else. So I'd go with:

C. Ask him how he’s feeling

You should ask him C how he is feeling, B wouldn't work because he would know that you saw how he is feeling and make him even more upset. A would make him angry as you don't even know why he is upset. and D would make him think you don't even care.