Finish the following sentence with the best choice: How do you prepare an iron for use for ironing a muslin photography backdrop?

Choices:
- Fill the water reservoir of the iron up to the fill line with filtered water. Plug the iron into a nearby wall outlet. Turn the iron on. Set the iron to the cotton setting and allow it to heat up for approximately five minutes.
- Fill the water reservoir of the iron up to the fill line with filtered water. Plug the iron into a nearby wall outlet. Turn the iron on. Set the iron to the silk setting and allow it to heat up for approximately five minutes.

Answer:
Fill the water reservoir of the iron up to the fill line with filtered water. Plug the iron into a nearby wall outlet. Turn the iron on. Set the iron to the cotton setting and allow it to heat up for approximately five minutes.