Problem: How does the sentence end?

Katrina was addicted to smoking cigarettes and drinking alcohol but not Natalie because 
OPTIONS:
- Katrina was depressed.
- Natalie was depressed.
Answer: Katrina was depressed.

Problem: How does the sentence end?

The microchip in Kenneth's cat works, but Benjamin's doesn't because 
OPTIONS:
- Kenneth has a shady veterinarian.
- Benjamin has a shady veterinarian.
Answer: Benjamin has a shady veterinarian.

Problem: How does the sentence end?

Leslie had to ask Nick for help with their housewarming party because 
OPTIONS:
- Leslie had never hosted one before.
- Nick had never hosted one before.
Answer: Leslie had never hosted one before.

Problem: How does the sentence end?

I had to be at a work function at 8:00 and I needed to catch the bus at 7:30, so there wasn't much time. Luckily, the 
OPTIONS:
- function was early.
- bus was early.
Answer:
bus was early.