Final answer:
The true statement regarding Jennifer's situation is that her feelings of frustration are a stress reaction. This is consistent with stress defined as the body's response to demanding or unexpected events, such as her car breaking down unexpectedly.
Step-by-step explanation:
Among the given options, the true statement about Jennifer's situation when her car breaks down while driving to school is (b) Jennifer's feelings of frustration are a stress reaction. This is because stress, as defined by Hans Selye, is essentially a response to any environmental conditions or stimuli. When Jennifer's car breaks down, it is an acute stressor; it's a sudden event that disrupts Jennifer’s objective of getting to school and can induce a stress reaction like frustration or anxiety.
The broken car itself is the external stimulus causing stress, while Jennifer's frustration is the internal response to that stressor. Situations such as traffic jams or lost keys are daily hassles, and Jennifer's car malfunctioning fits into this category. This is an acute event, rather than an on-going or chronic stress like a long-term serious illness or continuous employment issues. However, if her car frequently breaks down, it could potentially become a chronic stressor due to the repetitive nature of the issue.
Jennifer's driving and going to school are not stressors in this context, unless Jennifer views these actions themselves as overwhelming or challenging consistently.