Story needs to be completed:
Felicia preferred to dye her hair blonde, while Emily's hair was dark, so 
OPTIONS:
- Felicia never bought bleach.
- Emily never bought bleach.

My choice:
Emily never bought bleach.
Problem: Continue the following story.

Patricia went to the bird cage in the zoo before Monica did because 
OPTIONS:
- Patricia owned several birds themselves.
- Monica owned several birds themselves.
Here's how I want to continue it: Patricia owned several birds themselves.
Problem: Picking up extra work shifts on the weekend was a necessity for Aaron but not Robert because 
OPTIONS:
- Aaron had large expenses.
- Robert had large expenses.

My choice: Aaron had large expenses.
[Q]: How does the sentence end?

Maria phoned Sierra last night and Christine phoned Jan last night. 
OPTIONS:
- Maria called Jan last night.
- Christine called Jan last night.

[A]: Christine called Jan last night.
QUES: Continue writing.

Tim liked using the credit card more than he liked writing checks because the 

OPTIONS:
- check was digital.
- credit card was digital.
+++++++++
ANS: credit card was digital.
QUES: Continue writing.

Christine asked Erin to read the blog they had just finished, but 

OPTIONS:
- Christine was unhappy about it.
- Erin was unhappy about it.
+++++++++
ANS:
Erin was unhappy about it.