Finish the following sentence with the best choice: How to file your nails properly

Choices:
- With a fine enough file you can file your nails even when they're painted and the finish will not be damaged whatsoever
- Using any nail file make sure you file towards the center of your nail; your nails have a grain and to do otherwise can make the nail end ragged

Answer:
Using any nail file make sure you file towards the center of your nail; your nails have a grain and to do otherwise can make the nail end ragged