Mark believes he's being treated unfairly and wants to talk to his supervisor about it so he can be treated more fairly but he's scared it will make his supervisor angry and bring more unfair treatment so Mark is experiencing conflict trying to make a decision.
If he doesn't talk to his supervisor about the unfair treatment he feels he is getting, it will continue unchecked but if he talks to his supervisor he might get angry and this may result in more unfair treatment. So Mark is experiencing conflict in trying to make a decision.
In my opinion, Mark is experiencing Hesitation as well as Skepticism due to the fact that he is not sure whether he should talk to his supervisor or not.
Explanation: Although no two humans are the same, identical twins are 99.9% genetically similar. They possess almost the same trait and are not just matching in outward look but also on behavior and intelligence. If Skyler took an intelligent test at age 9 and scored 100, it's easy to predict Sloan's score to be 100 especially as the twins were nurtured by both parents probably growing up in same environment.