A Company Wants to Select No More Than 2 Projects $\le$

Multiple Choice

A company wants to select no more than 2 projects from a set of 4 possible projects. Which of the following constraints ensures that no more than 2 will be selected?

A) X₁ + X₂ + X₃ + X₄ = 2
B) X₁ + X₂ + X₃ + X₄ $\le$ 2
C) X₁ + X₂ + X₃ + X₄ $\ge$ 2
D) X₁ + X₂ + X₃ + X₄ $\ge$ 0