Finish the following sentence with the best choice: To decide whether to discard dark cooking oil,

Choices:
- 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.
- 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:
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.