Answer:
C. threat; challenge
Step-by-step explanation:
Stressor: The term stressor refers to the phenomenon that produces either psychological or physical stress that can be negative as well as positive. In other words, the stressor is defined as any stimulus, experience, or an event that leads to produce stress in an individual. The experience and event included in the stressor are considered to be challenges or threats to the person. It often produces several emotional responses, for example, hate, anxiety, sadness, or anger, etc.
In the question above, the given statement signifies the threat and challenge aspect of a stressor.