Traditional Rosé is made by making wine with red grapes but separating the skins immediately. You use a process called straight to press. Red wine grapes have a red skin but a clear interior therefore, whenever you press the grapes (separate the skins from the juice) the red skin will touch the clear juice for a short period of time therefore giving it a light pink colour. Red wine gets its dark red colour but fermenting the juice on the skins for typically up to seven days. The skins break down over this period therefore giving wine that dark red colour.
To the trivia question, I wouldn’t be surprised though that if there were Rosé wines out there that are a mix of red and white wine. Actually, I can almost guarantee it. Whether they can be called Rosé is up to debate though. Also, there are thousands of different grape varieties that come in all shape, colours and sizes. There are grapes out there that have a light pink hue on the skin which could be fermented like a normal red wine and come out with a pink colour. D) is more of a joke answer but, someone has definitely added rose petals to wine before, it seems like everyone else has!
Correct Answer to the Trivia is A.