The correct options are
A They control the temperature, pressure and pH of the broth
C The fermenters are the huge vessels in which the microbes grow in a broth
D The fermenters provide sterile condition for microbial growth
Fermentors are the ideal setup to grow microbes in a mass scale. They provide sterile conditions where the microbes can grow uniterrupted in a broth. The fermentor also has the provision to control temperature, pressure and pH of the broth so that the microbes get the most ideal conditions for growth.