Which problem could be solved using this equation?
12x + 3 = 39



A. Three eggs fewer than some dozen make a total of 39 eggs. How many dozens are there?

B. One dozen regular milk cartons and some 3-packs of chocolate
milk make a total a of 39 cartons.
How many 3-packs are there?

C. An order with 12 books and 3 magazines is in a box of a 39 items.
How many other items are in the box?

D. Three inches and some number of feet have a total measurement a
of 39 inches. How many feet are there?