I’m unsure if you even can, does it say u can anywhere. maybe worth googling?
Since its a sibling, and siblings tend to be in a person's close circle of people, informal speech is used.
Minus is known as a dash and a plus is usually known as and
As a writer, after structural revising, I tend to revise grammically, and change any sentence errors, or change any phrases or words!!
I would say the correct answer is a hermit
