Respuesta :
A. Joy, my youngest sister, won the state spelling bee. doesn't that just sound better?
The answer to the question above would be that the most effective subsitute for the underlined part of the sentence is the following one: Joy, my youngest sister, won the state spelling bee. That is, the correct option would be A.
This is an appositive. The appositive is a noun or noun phrase that renames another noun right beside it. As the information provided by the appositive is not essential, it is set off with commas to separate it from the rest of the sentence. In this case, it renames the proper noun "Joy".
