Problem: How does the sentence end?

The doctor operated on the pancreas but not the liver because the 
OPTIONS:
- pancreas was healthy.
- liver was healthy.
Answer: liver was healthy.

Problem: How does the sentence end?

Randy is always late for the first period while Joseph is always on time as 
OPTIONS:
- Randy is a night owl.
- Joseph is a night owl.
Answer: Randy is a night owl.

Problem: How does the sentence end?

Neil wanted to help his good friend Benjamin quit smoking for 
OPTIONS:
- Neil was an current smoker.
- Benjamin was an current smoker.
Answer: Benjamin was an current smoker.

Problem: How does the sentence end?

Angela's budgie tweeted loudly every morning, which annoyed Laura to no end. 
OPTIONS:
- Angela apologized for the tweeting but nothing could be done.
- Laura apologized for the tweeting but nothing could be done.
Answer:
Angela apologized for the tweeting but nothing could be done.