Ethanol Production Conditions Steps:

• Identify ethanol from ethene via acid-catalyzed hydration requiring high temperature (300°C) and pressure (60 atm ≈ 6000 kPa) with steam.
• Identify ethanol from glucose via anaerobic fermentation using yeast at mild temperature (around 35°C) without oxygen.
• Evaluate A: Matches ethene hydration conditions exactly.
• Eliminate B, C, D by mismatched temperature, pressure, or oxygen presence.

Why A is correct:

• Hydration of ethene follows Markovnikov's rule under phosphoric acid catalysis with steam at 300°C and 6000 kPa to form ethanol efficiently.

Why the others are wrong:

• B: Yeast enzymes denature at 135°C, preventing fermentation.
• C: 60 kPa is too low for the reaction equilibrium to favor ethanol formation.
• D: Oxygen presence promotes aerobic respiration over alcoholic fermentation.

Final answer: A