What Is the Correct Constraint for Node 2 in the Following

question 43

Multiple Choice

What is the correct constraint for node 2 in the following diagram? ​ ​

• A) X₁₂ + X₂₃ = 100
• B) X₁₂ − X₂₃ ≤ 100
• C) −X₁₂ + X₂₃ ≥ −100
• D) X₁₂ − X₂₃ ≥ 100

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