Answer: B. eustress
Explanation: Eustress is simply refered to as a positive reaction or response towards a stressor. It is the feeling of fulfilment from facing a challenge possed by a stressor.
Eustress is usually not determine by a stressor rather it is how one feels toward the stressor or how one perceived it. The kind of stress Derek is experiencing is called Eustress, i.e the positive response towards the challenge possed by the number one team in their division league.
