Problem: Continue the following story.

The mother told the boy it was safer to ride his bike on the sidewalk instead of the path because the
OPTIONS:
- sidewalk was flatter.
- path was flatter.
Here's how I want to continue it: sidewalk was flatter.

Problem: Continue the following story.

Christine tripped over the debris in the road unlike Carrie, because
OPTIONS:
- Christine is very attentive and alert.
- Carrie is very attentive and alert.
Here's how I want to continue it: Carrie is very attentive and alert.

Problem: Continue the following story.

Rebecca's collection of silver coins were tarnished, and Elena refused to clean them since they were rare coins.
OPTIONS:
- Rebecca was upset that the coins were still dirty.
- Elena was upset that the coins were still dirty.
Here's how I want to continue it:
Rebecca was upset that the coins were still dirty.