Please choose the correct solution to the question: To decide whether to discard dark cooking oil,

Solution1: smell the oil for a rancid smell, check to see if it is too thick, and throw away oil that is too dark or foamy.

Solution2: smell the oil for a flowery smell, check to see if it is too thick, and throw away oil that is too dark or foamy.

Answer format: solution1/solution2
Answer: solution1