Problem: How does the sentence end?

Matthew put copper insulation in their pipes while Robert didn't, so 
OPTIONS:
- Matthew 's pipe were clean.
- Robert 's pipe were clean.
Answer: Matthew 's pipe were clean.

Problem: How does the sentence end?

Jason asked Jeffrey to help them make their password because 
OPTIONS:
- Jason had strong creative abilities.
- Jeffrey had strong creative abilities.
Answer: Jeffrey had strong creative abilities.

Problem: How does the sentence end?

Benjamin never shaved, while Matthew did so every other day, so 
OPTIONS:
- Benjamin never bought razors.
- Matthew never bought razors.
Answer: Benjamin never bought razors.

Problem: How does the sentence end?

The infection cleared up after adding alcohol rather than cider, because in this case, the 
OPTIONS:
- alcohol is effective.
- cider is effective.
Answer:
alcohol is effective.