Below is a generic equation for a reaction. If I mix 2 units of A, with 6 units of B, which of the following is true?

2A + 3B → C + 3D

•  A. There would be no reaction.
•  B. Both reactants will fully react.
•  C. Substance A will be the limiting reactant.
•  D. Substance B will be the limiting reactant.
•  E. Not enough information given