Context: The day was saved when we found a grill and then Avery had the genius idea to take half a cardboard box that had once held Red Stripe and fill it with paper and charcoal . It was like a charcoal chimney except that it itself was flammable . Again , that could have gone horribly wrong , but it worked perfectly .

Question: Why would they use the Red Stripe box ?
Options:
0. They needed something for holding flammable material .
1. None of the above choices .
2. They needed something for holding beer .
3. They needed something for holding keys .
Answer: 0