Finish the following sentence with the best choice: adding scents to lotion bars

Choices:
- grate the wax and melt, in a double boiler. Add the oils to the water in the bottom of the double boiler.
- once the lotion and wax have melted, and reached the trace stage, add the scented oils and stir to combine.

Answer:
once the lotion and wax have melted, and reached the trace stage, add the scented oils and stir to combine.