Which statement explains how ethanol is produced from ethene?
- ASteam is added to ethene using an acid catalyst at $30\,^{\circ}\text{C}$.
- BSteam is added to ethene using an acid catalyst at $300\,^{\circ}\text{C}$.
- CEthene is fermented using yeast at $30\,^{\circ}\text{C}$.
- DEthene is fermented using yeast at $300\,^{\circ}\text{C}$.