Which of the Following Statements Is NOT True

Which of the following statements is NOT true?

A) For non-linear (more complex) inequalities an alternative to the linear programming model must be used
B) When presenting the graphical solution to a linear programming problem as much information as possible should be shown on the diagram
C) The sign technique is one method that can be used to confirm that the inequality is the correct side of the corresponding defining line
D) An alternative method for resolving more complex linear programming problems is the 'simplex' method