Capital Co.is considering 5 different projects.Define Xi as a binary variable that equals 1 if project i is undertaken and 0 otherwise,for i = 1,2,3,4,5.Which of the following represents the constraint(s)stating that projects 2,3,and 4 cannot all three be undertaken simultaneously?
A)X2 + X3 + X4 ≤ 3
B)X1 + X2 + X3 + X4 + X5 ≤ 3
C)X2 + X3 + X4 ≤ 1
D)X2 + X3 + X4 ≤ 2
E)X2 + X3 ≤ 1 and X3 + X4 ≤ 1

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The Answer of Capital Co.is considering 5 different projects.Define Xi as a binary variable that equals 1 if project i is undertaken and 0 otherwise,for i = 1,2,3,4,5.Which of the following represents the constraint(s)stating that projects 2,3,and 4 cannot all three be undertaken simultaneously?
A)X2 + X3 + X4 ≤ 3
B)X1 + X2 + X3 + X4 + X5 ≤ 3
C)X2 + X3 + X4 ≤ 1
D)X2 + X3 + X4 ≤ 2
E)X2 + X3 ≤ 1 and X3 + X4 ≤ 1