Original sentence:
Before she lost her nerve, she stepped over the invisible line and onto the trail.
Look at the following sentences and find what has changed. What is the effect of the change:
1. Before she lost her nerve. She stepped over the invisible line and onto the trail.
2. Before she lost her nerve, she stepped over the invisible line and into the trail.
3. Before she lost her nerve she stepped over the invisible line and onto the trail.