In This Scenario, What Is the Most Likely Procedure Beer

In this scenario, what is the most likely procedure beer makers use to produce alcohol from starchy grains?

A) The starch is converted into a polymer of many glucose molecules before being used.
B) The starch is converted into glycogen, which is easier for the yeast to digest.
C) Water is used to break the bonds between glucose subunits in the starch, in a form of dehydration synthesis.
D) The starch is broken down into mono- and/or disaccharides by hydrolysis before use.