How do variable costs per unit behave? a. they remain the same throughout production

The correct answer is option A.

Explanation:

The relevant range can be defined as the level of activity that is limited by a maximum and minimum amount. Outside this range, costs and benefits are likely to differ from the expected amount.  

In the relevant range, the fixed costs remain the same and the variable cost per unit remains constant as well. The total variable cost will vary with the volume of production.

3,1,4,2

Explanation:

order fulfilment

shipment of goods

inventory control

receiving goods