Which of the following sentences is punctuated correctly?
A.
Yvette could not believe that she forgot to buy flour—an item on her shopping list.
B.
Yvette could not believe, that she forgot to buy flour an item on her shopping list.
C.
Yvette could not believe—that she forgot to buy flour—an item on her shopping list.
D.
Yvette could not believe (that she forgot to buy flour) an item on her shopping list.