If There Is a "Limiting Reactant" in the Hypothetical Reaction

Multiple Choice

If there is a "limiting reactant" in the hypothetical reaction,
it is the substance

A) on the right that is produced in a limited amount.
B) on the left that is used to produce substance C on the right.
C) on the left that is used up first.
D) on the left that is limited by the amount of C produced.