Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to roast yams [title] Preheat the oven to 175 degrees centigrade (350 degrees fahrenheit). [step] Line a baking pan or dish with aluminium foil. [title] Rinse the yams with water and rub off any dirt.

Ending1: [step] Wash them under cool, running water, and pat dry. [title] Carefully place one ripe yams, buttocks first, in a mortar and pestle. Ending2: [title] Cut the yam or yams. [step] Depending on your preferences and the size of the yam, cut the yam into fourths, sixths, or eighths. Ending3: [step] You may want to clean the yams inside and outside before roasting them. If you want to save time, you can omit the washing and cooking. Ending4: [step] Scoop them off with a sieve. [title] Rub the yams with a little salt and pepper to taste.

Answer format: ending1/ending2/ending3/ending4