Read the Following Vignette and Answer the Subsequent Questions to the Best

Read the following vignette and answer the subsequent questions to the best of your ability.
Seon had always wanted to be a nurse. As soon as she finished college, she signed up for community college courses in the field. However, within two months of starting school, Seon became pregnant. She still wants to be a nurse but decided to stop going to school full-time to focus on her role as mother. Her stepmother, a nurse, tries to encourage her not to give up her dream of nursing and tries to help out with childcare to Seon reach her professional goals.
-Seon's decision to stop going to school to take care of her child represents which aspect of life course sociology?

A) timing
B) turning point
C) historical context
D) agency