What does the term "straight" indicate on a Bourbon bottle?

The term "straight" on a Bourbon bottle indicates specific regulations regarding its production, particularly referring to aging and flavoring. When a Bourbon is labeled as "straight," it signifies that the whiskey has been aged for a minimum of two years in new charred oak barrels. If the aging is less than four years, the age statement must be displayed on the label. Additionally, "straight" also means that the whiskey does not contain any added flavoring or coloring, adhering to the traditional production standards of Bourbon.

The combination of these requirements explains why both the criteria regarding aging (at least two years in new oak barrels) and the absence of added flavoring are essential elements of what "straight" signifies in the context of Bourbon whiskey. Thus, it is correct to conclude that the answer encompasses both aspects, making the designation of "both A and C are correct" the right choice.