Finish the following sentence with the best choice: Stop a key from sticking in a lock, or from being difficult to put into a lock.

Choices:
- Use a paper towel and apply some glue to the key.  Wipe the key almost clean, a small amount of glue will be left behind allowing the key to slide in and out easily.
- Use a paper towel and apply some oil to the key.  Wipe the key almost clean, a small amount of oil will be left behind allowing the key to slide in and out easily.

Answer:
Use a paper towel and apply some oil to the key.  Wipe the key almost clean, a small amount of oil will be left behind allowing the key to slide in and out easily.