If P_ij = the Production of Product I in Period $\le$

Multiple Choice

If P_ij = the production of product i in period j, then to indicate that the limit on production of the company's three products in period 2 is 400,

A) P₂₁ + P₂₂ + P₂₃ $\le$ 400
B) P₁₂ + P₂₂ + P₃₂ $\le$ 400
C) P₃₂ $\le$ 400
D) P₂₃ $\le$ 400