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

How to make good xo chicken wings
Wash the chicken wings thoroughly under the kitchen tap.
( defrost and thaw if you're using the frozen ones, there should be 22-28 wings depending on the sizes. )
Use a pair of tweezers to pluck out any remaining feathers.

OPTIONS:
(1). There might seem to be one of many flaky spots on the wings but no matter how hard you check, the best place to do so is just under an egg yolk. Then use a rolling pin to gently touch the yolk with a circular motion.
(2). How do you do this is up to you. These will leave behind small " flakes ".
(3). When you have plucked away all the feathers, push through the meat gently. It is very important that you don't squash it or you'll get a tough, burnt chicken breast.
(4). Dislocate the all the joints of the chicken wings without tearing the meat by bending the chicken wings in the opposite direction to the rotating joint. This allows the wings to be skewered properly and thus, allowing the meat to cook evenly on the pit.
The answer is:
(4).