Story needs to be completed:
At the coffee shop Erin prepared the beverage for Christine, since 
OPTIONS:
- Erin was the customer.
- Christine was the customer.

My choice:
Christine was the customer.
Problem: Continue the following story.

Brian wanted to teach Robert how to paint using watercolors because 
OPTIONS:
- Brian was a good teacher.
- Robert was a good teacher.
Here's how I want to continue it: Brian was a good teacher.
Problem: Amy wanted to tell Laura she had really bad breath, because 
OPTIONS:
- Amy was uncomfortable around her.
- Laura was uncomfortable around her.

My choice: Amy was uncomfortable around her.
[Q]: How does the sentence end?

The bitter coffee was drunk happily by Logan but not William because 
OPTIONS:
- Logan got no sleep the night before.
- William got no sleep the night before.

[A]: Logan got no sleep the night before.
QUES: Continue writing.

Maria is struggling with her exams and asks for help from Rebecca, because 

OPTIONS:
- Maria is already successful.
- Rebecca is already successful.
+++++++++
ANS: Rebecca is already successful.
QUES: Continue writing.

Being on time was more important to Megan than to Felicia , so it was a surprise when 

OPTIONS:
- Megan showed up early.
- Felicia showed up early.
+++++++++
ANS:
Felicia showed up early.