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

Multiple Choice

Let P_ij = the production of product i in period j. To specify that production of product 1 in period 3 and in period 4 differs by no more than 100 units,

A) P₁₃ -P₁₄ $\le$ 100; P₁₄ -P₁₃ $\le$ 100
B) P₁₃ - P₁₄ $\le$ 100; P₁₃ -P₁₄ $\ge$ 100
C) P₁₃ -P₁₄ $\le$ 100; P₁₄ -P₁₃ $\ge$ 100
D) P₁₃ - P₁₄ $\ge$ 100; P₁₄ - P₁₃ $\ge$ 100