Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make fudge [title] Gather together the ingredients found in the " ingredients " section. [title] Pour the chocolate chips into your microwave-friendly bowl, or if you don't have a microwave, a non-stick metal saucepan. [title] Add condensed milk and vanilla extract.

Ending1: [step] Be careful not to whisk it/break it as this will introduce water if you're using small saucepans. [title] Simmer at low heat for about two minutes or so until the fudge is smooth. Ending2: [title] If not already chopped, place walnuts on a breadboard and chop them into fairly small pieces. [title] If you have a microwave, put the bowl in the microwave and heat for 1-3 minutes. Ending3: [step] Stir the ingredients together with a whisk or spoon. [title] Transfer the fudge into your preheated oven. Ending4: [step] Stir them together with a metal spoon. [title] Heat the mixture through a strainer to stop the chocolate from getting lumpy.

Answer format: ending1/ending2/ending3/ending4