Consider the Following 0 - 1 Integer Programming Problem

Multiple Choice

Consider the following 0 - 1 integer programming problem: If we wish to add the constraint that X must be positive,and that only Y or Z,but not both,can be positive,how would the additional constraint(s) be written?

A) X + Y + Z ≤ 3,Y + Z ≤ 1
B) X ≤ 1,Y + Z = 1
C) X ≤ 2,and Y ≤ 2,and Z ≤ 2
D) X = 1,Y + Z ≤ 1
E) None of the above