Finish the following sentence with the best choice: To sand corks to prime them for a cork board,

Choices:
- use a heavy grit sand paper to sand them manually. Make sure the corks you are using are even with the board.
- use a heavy grit sand paper to sand them automatically. Make sure the corks you are using are even with the board.

Answer:
use a heavy grit sand paper to sand them manually. Make sure the corks you are using are even with the board.