Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make extra crispy roast potatoes [title] Preheat the oven. [step] Set the oven to 220ºc (425ºf/gas mark 7). [title] Parboil the potatoes.

Ending1: [step] Place the parboiled potatoes in an immersion pot filled with water. Simmer for about five minutes, stirring occasionally, then cook for a little longer. Ending2: [step] Fill a slow cooker with 2 to 3 inches (5 to 7.6 cm) of water. Place the potatoes in the water and allow the water to come to a boil. Ending3: [step] Put them in a small saucepan. Add 1/2 cup (120 ml) of water. Ending4: [step] Place the potatoes into a saucepan of water. Cover with the pan lid and bring to a simmer.

Answer format: ending1/ending2/ending3/ending4