Unknown Pritchett or Parham woman

Need help identifying the approximate date the photo was taken. This photo was displayed in our home while I was growing up. My mother said she was ' a grandmother', but I never asked which one. Both of my grandmothers had died when my parents were small and I never knew the joy of a grandmother. Only recently have I developed an interest in family history. I could not figure out who this lady was. Then, three weeks ago I met a long lost cousins ( we share the same 4th great grandparents). She pulled out old photographs of people she was unable to identify. There was the exact same photograph.
We have narrowed it down to my great, great grandmother, Susan Jane McKenney Pritchett - Born 1843/ Died 1915 - age 72 or my great grandmother, Sarah Minnie Parham - Born 1872/Died 1922 - age 50.
The woman in the photo looks to me to be around her mid 20s or younger. If anyone can determine the approximate decade the photo might have been made, then I can pinpoint which woman it is.
Susan Jane McKenney Pritchett was my cousin's great, great, great aunt. Sarah Minnie Parham was no relation to my cousin's family other than the daughter-in-law of Susan Jane McKenney Pritchett. It seems more likely my cousin's family would have had a photo of their brother's sister, Susan Jane, than a photo of her daughter-in-law, but only figuring out when the photo might have been made will we be able to figure it out.
Thanks to anyone who can give me a clue!

In what decade was it most likely taken?