Which of the following pairs of items would retailers think of as the same SKU?
a) 16-ounce bottle of Pepsi and 16.9-ounce bottle of Coke
b) Size 8 Levi's jeans in blue and size 8 Levi's jeans in black
c) 12-pack of Colgate toothpaste and 8-pack of Crest toothpaste
d) 24-pack of Snickers bars and 12-pack of Twix bars