Question: What do you need to make a knife rust-proof?

  Options: 
 A. To make a knife rust-proof, you need white vinegar, rubbing alcohol, a cup, a pot/stove, paper towels, and a carbon steel knife.
 B. To make a knife rust-proof, you need tomato sauce, rubbing alcohol, a cup, a pot/stove, paper towels, and a carbon steel knife.
Answer: A