Which of the following are factors that influence yeast fermentation in dough?

• A. Oven temperature, pan size, and humidity
• B. Flavor, aroma, and texture
• C. Temperature, time, and available fermentable sugars (plus salt concentration and moisture)
• D. Yeast age, flour type, and sugar type

Answer: (C)

Fermentation in dough is the yeast converting available sugars into CO2 and alcohol, and the rate and extent of that process are guided by temperature, time, and how much fermentable sugar is present (with salt concentration and moisture also affecting the rate). Temperature sets how fast the yeast can work: too cold slows activity, too hot can kill it. Time determines how far fermentation can proceed, up to limits set by sugar availability and the dough’s conditions. The amount of fermentable sugars matters because yeast needs substrate to consume; in dough these sugars come from added ingredients and from starch breakdown in flour. Salt and moisture influence the process too—salt creates osmotic pressure that can slow or stop fermentation if too high, while moisture level affects water activity and yeast metabolism. The other options describe baking conditions or outcomes rather than the factors that control fermentation itself, or they omit key drivers like temperature and time.