A Production Optimization Problem Has 4 Decision Variables and a Requirement

Multiple Choice

A production optimization problem has 4 decision variables and a requirement that at least b₁ units of material 1 are consumed. Which of the following constraints reflects this fact?

A) f(X₁, X₂, X₃, X₄) $\ge$ b₁
B) f(X₁, X₂, X₃, X₄) $\le$ b₁
C) f(X₁, X₂, X₃, X₄) = b₁
D) f(X₁, X₂, X₃, X₄) $\neq$ b₁