The drifter pulled out his harmonica while riding the train and played a tune on the 
OPTIONS:
- harmonica .
- train .
harmonica .

Felicia had a lower metabolism than Katrina, so 
OPTIONS:
- Felicia could eat a lot more before gaining weight.
- Katrina could eat a lot more before gaining weight.
Katrina could eat a lot more before gaining weight.

Carrie was a teacher of math and Elena was their student, so 
OPTIONS:
- Carrie gave lots of homework.
- Elena gave lots of homework.
Carrie gave lots of homework.