Use the scheme of location (J, C, or G) and excursion (S, P, H, L, Te or Tu) to represent the decision variables. What of these alternative sets of constraints ensures that no activities are duplicated at the ports of call?
A) JS + JP + JH + JL + CS + CP + CH + CL + CTe + GS + GP + GH + GL + GTu ? 3
B) JS + JP + JH + JL = 1
CS + CP + CH + CL + CTe = 1
GS + GP + GH + GL + GTu = 1
C) JS + CS + GS ?1
JP + CP + GP ?1
JH + CH + GH ?1
JL + CL + GL ?1
D) JS + JP + JH + JL + CS + CP + CH + CL + CTe + GS + GP + GH + GL + GTu = 3
Answer: C
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