Question: Which is true in the context of the simplex method in linear programming problem? A . slack and surplus variables are used to express constraints

Which is true in the context of the simplex method in linear programming problem?
A. slack and surplus variables are used to express constraints in equality form
B. slack and surplus variables are collectively referred to as basic variables
C. slack and surplus variables are treated as non-negative
D. All of the above are true
Which is true in the context of the simplex method in

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