Which statement correctly compares fermentation times of ales and lagers?

• A. Ales require longer fermentation times than lagers.
• B. Lagers require longer fermentation times than ales.
• C. Fermentation time is the same for ales and lagers.
• D. Temperature is the only factor determining fermentation time.

Answer: (B)

Fermentation time is driven by the yeast strain and the temperature at which it works. Ales use top‑fermenting yeast at warmer temperatures, so sugars are consumed more quickly and the fermentation finishes in a shorter time. Lagers use bottom‑fermenting yeast at cooler temperatures, which slows the process and typically requires additional cold conditioning after the main fermentation. That combination means lagers generally take longer to finish fermentation (and to mature) than ales. The other statements don’t fit because they either reverse the timing, say the times are the same, or claim temperature is the only factor—while temperature is important, other factors like yeast health and conditioning also influence how long fermentation takes.