Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to cook pork crackling [title] Purchase a pork roast or joint, preferably either belly or shoulder. [step] This recipe can only be done with a thick layer of fat atop the roast. Some cooks insist the pork belly and shoulder, two fatty cuts of meat, produce the best crackling.

Ending1: [title] Defrost the meat in the refrigerator for 12 to 36 hours if it is frozen. [step] Remove it from the refrigerator and place it in a roasting pan with the fat layer facing up. Ending2: The meat can usually be cut before roasting. [title] Heat oil in a medium pan or small skillet. Ending3: [title] Place the roast in the refrigerator and let the pork roast rest for one hour before carving (slicing the roast vertically). [step] Depending on the size of your roast, this will take place anywhere between 8 and 15 minutes. Ending4: [substeps] For tougher pork, cut open the neck and flesh of the pork roast and apply a heavy layer of fat to the meat. Hot fat will tenderize the pork, leaving it tender and flavorful as the fat melts.

Answer format: ending1/ending2/ending3/ending4