Which of the Following Are Assumptions or Requirements of the Transportation

Multiple Choice

Which of the following are assumptions or requirements of the transportation method?
(I) Goods are the same, regardless of source.
(II) There must be multiple sources.
(III) Minimum quantities must be shipped from each source.
(IV) Shipping costs per unit do not vary with the quantity shipped.

A)  I and IV
B)  II and III
C)  I, II, and IV
D)  I and III
E)  I, II, III, and IV