During stage 1, which aroma compounds or precursors are present?

• A. Some aroma compounds and aroma precursors (methoxypyrazines).
• B. Terpenes only.
• C. No aroma compounds.
• D. Only esters.

Answer: (C)

Stage 1 is the moment when no volatile aroma compounds have yet been released and there are no aroma precursors actively contributing to aroma. At this earliest stage, the must contains only nonvolatile components, and any aroma that will develop later has not been formed or released. Aromas such as esters, terpenes, or methoxypyrazines come into play in later steps (fermentation or aging), when transformations release or create volatile compounds from bound precursors. Because nothing volatile is present at this initial stage, the correct choice reflects that no aroma compounds or their precursors are detectable at Stage 1.