Which of the following schemes is the correct order describing the levels of the merchandise classification scheme from the highest level to the lowest level?

Classification$-$Department$-$Category$-$Merchandise Group$-$SKU

Merchandise Group$-$Classification$-$Department$-$Category$-$SKU

Merchandise Group$-$Department$-$Classification$-$Category$-$SKU

Category$-$Classification$-$Merchandise Group$-$Department$-$SKU