Please choose the correct solution to the question: How to thicken tomato sauce without changing the flavor?

Solution1: Once the tomato sauce has come together, reduce it by increasing the heat and leaving the lid off the pot until it is about one fifth less

Solution2: Before the tomato sauce has come together, reduce it by lower the heat and leaving the lid on the pot until it is about one fifth less

Answer format: solution1/solution2
Answer: solution1