Please choose the correct ending to complete the given sentence: Youth: [header] How to be a good little sister [title] Say sorry when you need to. [step] You won't always get along with your older siblings. You may hurt their feelings or make a mistake.

Ending1: If at all possible, acknowledge your impact on them. Knowing that you are sorry will only make it harder for them to forgive you when they need to. Ending2: When you apologize, you are admitting that you have done something wrong and are trying to fix it. When you apologize, be specific about what you did and how you will change your behavior. Ending3: This won't go away after you learn to say sorry. [substeps] Act your best when you need to. Ending4: Don't let it be a source of resentment for them. Let them know that their actions hurt you and that you're sorry for it as well.

Answer format: ending1/ending2/ending3/ending4