Which is grammatically correct?

Related questions

1. What is easier to spread jelly or jam?
2. Which spreads better jelly or jam?
3. Is Oxford British or American?
4. Does vocabulary increase with age?
5. How much should you read a day?
6. Is there such word as worser?
7. Why do Americans call jam jelly?
8. Is Cab American or British?
9. Is vacation American or British?
10. What is vocabulary and types?

Tags

1. #grammatically
2. #people
3. #arguably
4. #correct
5. #sounds
6. #sentences
7. #because
8. #referring
9. #sentence
10. #still
11. #formal
12. #though
13. #avoid
14. #object
15. #choice
16. #should
17. #usage