Select the correct answer. Which statement is true about limiting reactants? A. The limiting reactant in a reaction is the first reactant to be completely converted to moles. B. The limiting reactant in a reaction is the first reactant to be completely converted to products. C. The limiting reactant in a reaction is the first reactant to be completely converted to energy. D. The limiting reactant in a reaction is the first reactant to be completely converted to heat.