Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make jam thumbprint cookies [title] Preheat the oven to 350 ° f (177 ° c). [title] Sift the flour. [step] Sieve the self-raising flour into a large bowl.

Ending1: [title] Add the butter or margarine. [step] Get your butter or margarine and break it up into pieces. Ending2: [title] Roll out a sheet of parchment paper using a rolling pin. [step] Mix all the pieces of parchment paper together with a rolling pin until you have formed about ¾ of a soccer ball. Ending3: [title] Wet the fingers of one hand and vigorously scrub the thumb and forefinger with the raw egg or yolk. [step] Use the other hand to wash the hands or put away the scrub. Ending4: To make sure that the flour sift all the way in, let it sit for 1 minute. Then scoop some lumps out of the flour.

Answer format: ending1/ending2/ending3/ending4