The use of “they” in that context is grammatically proper. I am not sure why you ar triggered over that.
This is a girl
The subject is a daughter, not a group of daughters.
Why is that grammatically proper?
The use of “they” in that context is grammatically proper. I am not sure why you ar triggered over that.
Wrong. N is singular. There is no instance in the English speaking world in which "they" is correct in this context.
Similarly, "ar" is never grammatically proper.