Please choose the correct solution to the question: How do you ripen bananas?

Solution1: Place bananas in a brown paper bag and close loosely. Ethylene will build up and circulate within the bag, speeding up the ripening process. Check at certain intervals in order to take them out at your desired ripeness.

Solution2: Place bananas in a brown plastic bag and close loosely. Ethylene will build up and circulate within the bag, speeding up the ripening process. Check at certain intervals in order to take them out at your desired ripeness.

Answer format: solution1/solution2
Answer: solution1