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

How to cook in a cast iron skillet 
Sear meat in your skillet. 
One of your skillet's greatest assets is its ability to give meats a high sear without scorching them. For instance, steak and roasts come out great.


(I) Avoid using lard as it tends to cause the meat to caramelize when the skillet is hot, which is why lard and all-purpose grease are needed. Check with your permit hall to see if cooking meat in your cast iron skillet is a acceptable option..
(II) Slowly heat the pan over a constant flame by turning a burner on low, and periodically increasing the flame size every few minutes. Once the burner is on high, add a piece of steak and cook until its surface is deep brown..
(III) Most cast iron skillets are meant to cook any type of poultry, but they aren't meant to only take center sear, such as chicken or trout. For round-cut poultry, you'll need to pre-heat your skillet before cooking your meat in the pan..
(IV) You can grill most of your meals from here. To grill, just heat the skillet with a little olive oil, or lay an oiled cloth on the surface of the skillet..
The answer is:
(II)