In a Graph with Cumulative Costs Per Unit as the Y-Axis

In a graph with cumulative costs per unit as the Y-axis, with two curves, one being the cumulative costs locked-in, and a second curve showing the cumulative costs per unit incurred in different business functions, which of the following is TRUE?

A) The graph will show the divergence between the amount of locked-in costs and costs incurred, by the end of the production cycle.
B) Locked-in costs rise much slower initially than the incurred cost, but joining the incurred cost line at the completion of the value chain functions.
C) The two cost lines will run parallel.
D) No differences unless the product is manufactured inefficiently.
E) Both curves deal with the same cumulative cost per unit.