Which of the Following Are Assumptions or Requirements of Transportation

Multiple Choice

Which of the following are assumptions or requirements of transportation problems?
I.Goods are the same,regardless of source.
II.There must be a single source.
III.Minimum quantities must be shipped.
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