Choose the suitable idiom for each situation.

Choose the correct option.

My sister and I got into a huge fight because of my favourite dress in her wardrobe. Today my sister apologized and... [raised a red flag.|raised a blue flag.|raised a white flag.|raised a green flag.]
Yesterday Milla won a tennis tournament in her town. How can this day be called? [A red-letter day|A blue-letter day|A white-letter day|A black-letter day]
My friend likes working in the garden, and it is filled with amazing flowers and plants. She is really a... [red flag.|white lie.|black sheep.|green thumb.]