Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to roast pine nuts [title] Prepare pine nuts for roasting. [step] Pour nuts into a colander and sort them, removing any discolored ones. [title] Preheat the oven to 350 degrees.

Ending1: [title] Remove the nuts from the colander. [step] Cut them into chunks with a vegetable peeler. Ending2: [title] Place cooking oil in a large skillet. [step] Pour 3 tablespoons of butter into the skillet. Ending3: [title] Grease your baking pan with non-stick greasing spray. [title] Dust the inside of the pan with flour. Ending4: [title] Place the pine nuts evenly on an ungreased baking sheet. [step] When the oven has preheated, place the baking sheet on a top oven rack and cook the nuts for 15 minutes.

Answer format: ending1/ending2/ending3/ending4