Q: Context: Girl Scout Cookies are cookies sold by Girl Scouts of the USA (GSUSA) as one of its major fundraisers for local Scout units. Members of the GSUSA have been selling cookies since 1917 to raise funds. Girls who participate can earn prizes for their efforts. There are also troop incentives if the troop as a whole does well. As of 2007, sales were estimated at approximately 200 million boxes per year.

Question: when did girl scouts first start selling cookies?
Let's give stream of consciousness below
To answer the question, consider the following: Members of the GSUSA have been selling cookies since 1917 to raise funds. So the answer is 1917.