This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to zest a lime
Wash the lime under cool, running water.
Rub the limes gently with your fingers to remove grime or waxy substances, even if there is no visible dirt on the lime. Pat dry with a clean towel to clean the lime further and make it easier to grip.

(I). Place your microplane above a cutting board at a 45-degree angle. A microplane grater is a flat or curved metal kitchen tool with tiny, sharp holes across its surface. (II). To zest a lime, remove its skin and expose exposed flesh. Cut away the stem and leaf vein. (III). Use fruit juice to zest the lime, whichever fruit taste appeals to you. You can use as many juices as the recipe calls for, or leave them to roast for an extra treat. (IV). To zest a lime, hold the lime by the stem by the hard body while you squeeze the stem with your thumb and the skin still attached. Slide the lime between the thumb and forefinger to scrape away dirt and grease that has accumulated on the lime.
The answer is:
(I).