The correct answer is D) exhaustion.
The other options of the question were A) primary. B) alarm. C) resistance.
Viggo needs to take an extended leave of absence from work for personal reasons. The remaining employees are required to perform Viggo's duties, and Dewitt is the only one who understands how to do many of them. Though Dewitt's body is unable to maintain the alarmed state it entered when he learned of the additional work, he remains "stressed out" over the weeks that follow. If the stressor of additional responsibility lasts too long, Dewitt could become sick and have trouble functioning himself, which would move him into the exhaustion stage of the General Adaptation Syndrome (GAS).
A medical researcher that developed his since the 1930s, created three phases of human response when facing stressful moments in its life. The name of the researcher was Hans Selye (1907-1982) a Hungarian endocrinologist who developed the idea of the General Adaptation Syndrome (GAS).
Phase 1 was the alarm phase, in which stress is recognized by the human body. Phase 2 is the Resistance phase, in which the body tries to cope with the stress. This means that the body can resist or adapt to stressful moments. Finally, phase 3 is called the Exhaustion phase, when all body's energy reserves are depleted. That is shy in this last phase, Dewitt could become sick and have trouble functioning himself.