Which of the Following Could Not Be a Constraint for a Linear

Multiple Choice

Which of the following could not be a constraint for a linear programming problem?

A) 1A + 2B $\le$ 3.
B) 1A + 2B $\ge$ 3.
C) 1A + 2B = 3.
D) 1A + 2B.
E) 1A + 2B + 3C $\le$ 3.