Which of the Following Is the General Format of an Objective

Multiple Choice

Which of the following is the general format of an objective function?

A) f(X₁, X₂, ..., X_n) $\le$ b
B) f(X₁, X₂, ..., X_n) $\ge$ b
C) f(X₁, X₂, ..., X_n) = b
D) f(X₁, X₂, ..., X_n)