A Company's Production Process Has an 85 Percent Learning Curve

A company's production process has an 85 percent learning curve rate. The process has produced 1,000 units to date. A process refinement is estimated to allow a future learning curve rate for the identical product of 75 percent. However, the initial unit made using the new process will take the same amount of time as the very first unit produced using the old process. At what point, using the new process, will the production rate exceed the production rate achieved by the old process?

A) By the 50^th unit
B) By the 80^th unit
C) By the 100^th unit
D) By the 120^th unit
E) By the 250^th unit