A Sub-Problem in a B & B Is Solved and Found

Multiple Choice

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

A) Yes, a feasible solution may be found when additional constraints are added.
B) Yes, removing a constraint in further analysis may restore feasibility.
C) No, adding more constraints will not restore problem feasibility.
D) No, the result cannot occur so re-examine the formulation and start over.