The reactant, along with oxygen, in cellular respiration is B) sugar.
The reactant, along with oxygen, in cellular respiration is sugars (option B). Cellular respiration is the process by which cells break down glucose (a type of sugar) and oxygen to produce energy, carbon dioxide, and water. To arrive at this answer, you can recall the process of cellular respiration or refer to a reliable source such as a biology textbook or online educational resource.
