Hydrogen fuel cells are a promising alternative to gasoline engines in part because they release water instead of carbon dioxide. In a hydrogen fuel cell, hydrogen gas (H2) and oxygen gas (02) react to make water as shown below. Which of the following statements is a true statement about how this reaction occurs? 2H2(g) + O2(g) → 2 H2O(g) A. A molecule of H2 and a molecule of o2 collide B. Two molecules of H2 and a molecule of O2 must collide at one time C. An O-H bond must break. D. An H-H bond must form E. The reactants must undergo a change of state for this reaction to occur