Microorganisms to be used commercially usually are developed in a series of defined steps. Which of the following has those steps in the correct order?

A) laboratory flask » pilot plant fermentor » laboratory fermentor » industrial fermentor
B) laboratory fermentor » laboratory flask » pilot plant fermentor » industrial fermentor
C) industrial fermentor » pilot plant fermentor » laboratory fermentor » labortory flask
D) laboratory flask » laboratory fermentor » pilot plant fermentor » industrial fermentor
E) pilot plant fermentor » labortory flask » industrial fermentor » laboratory fermentor