Read this passage:

As the emergency room doctors tended to her brother, Ricki suddenly realized what she wanted to do with her life. She had been wandering aimlessly for years, but watching the doctors and nurses work in unison to save a life made her aware that this was where she belonged: in a hospital like this, using her skills to help people.
What plot element is this passage an example of?
A. Climax
B. Exposition
C. Rising action
D. Conclusion