Final answer:
The most severe challenge to be faced during adulthood is probably loss of one's job. Unemployment can cause financial stress, affect relationships, and have a negative impact on mental and physical health.
Step-by-step explanation:
The most severe challenge to be faced during adulthood is probably A. loss of one's job.
Unemployment can be a terrible and wrenching life experience, causing day-to-day financial stress, painful adjustments, and affecting family relationships as well as mental and physical health. Many people consider their job an important part of their self-worth, so when unemployment separates them from the workforce, it can have a significant impact.