[Q]: How does the sentence end?

Maria had bad eyes and needed glasses but Katrina did not. 
OPTIONS:
- Maria went to the ophthalmologist.
- Katrina went to the ophthalmologist.

[A]: Maria went to the ophthalmologist.
QUES: Continue writing.

Samantha had the symptoms of the flu but Cynthia doesn't. 

OPTIONS:
- Samantha went to the store to buy some tampons.
- Cynthia went to the store to buy some tampons.
+++++++++
ANS: Cynthia went to the store to buy some tampons.
Problem: How does the sentence end?

The bank was on the brink of collapse while the brokerage was healthy, because the 
OPTIONS:
- bank was freewheeling with its debt .
- brokerage was freewheeling with its debt .
Answer: bank was freewheeling with its debt .
sentence: Piper made a big batch of root beer and wanted to store it in the fridge, but the  OPTIONS:
- batch was too small.
- fridge was too small.
complete: fridge was too small.
The company that Angela worked for was far worse than that of Christine because 
OPTIONS:
- Angela got many benefits.
- Christine got many benefits.
Christine got many benefits.
Problem: Continue the following story.

Joel wants to learn how to calculate asset impairment so he asks Derrick for help, because 
OPTIONS:
- Joel doesn't know how to do it.
- Derrick doesn't know how to do it.
Here's how I want to continue it:
Joel doesn't know how to do it.