Select from options: Continue writing the next sentence.

How to use lavender oil 
Dilute pure lavender oil in your choice of carrier. 
Applying pure essential oil to your skin can potentially cause severe irritation. The most common dilution is a 2% preparation, or 12 drops of lavender oil per 1 fluid ounce (30 ml) of your carrier oil, lotion, or other moisturizer.

Available choices:
 (a). Apply pure lavender oil to skin with only minimal redness. Lavender oil can be used on more than one skin type.;
 (b). Check product labels to make sure the essential oil that you use is pure lavender oil or that you are using an oil containing properties similar to the carrier oil. Measure out 1/2 cup (120 ml) of the carrier oil.;
 (c). Popular carrier oils include coconut, olive, sweet almond, argan, and avocado oils. You can either dilute the lavender oil ahead of time and store it, or you can dilute a little each time you need it.;
 (d). On top of that, the most common carrier oil is argon. To dilute your essential oil , 2 drops of argon is recommended.;
Answer:
(c).