Which Statement Is True Regarding Baked Products

Which statement is true regarding baked products?

A) The simplest flour mixture is made from flour and water.
B) Optional ingredients include milk, fat, eggs, sugar, salt, flavoring, and leavening agents.
C) The ingredients of a flour mixture may be divided into dry or liquid categories.
D) The types and proportions of ingredients determine the structure and volume of the finished product.
E) All of these are correct.