Question: A sub - problem in a B & B is solved and found infeasible. Should the B & B algorithm continue further analysis on this

A sub-problem in a B & B is solved and found infeasible. Should the B & B algorithm continue further analysis on this candidate problem?
No, the result cannot occur so re-examine the formulation and start over.
Yes, removing a constraint in further analysis may restore feasibility.
Yes, a feasible solution may be found when additional constraints are added.
No, adding more constraints will not restore problem feasibility.
A sub-problem in a B & B is solved and found

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