What Is the Constraint Associated with Machine 2 for the Following

Multiple Choice

What is the constraint associated with machine 2 for the following assignment problem?
$$\begin{array} { l l l l l } & & { \text { Machine } } \\& & { 1 } & { 2 } & { 3 } \\& \text { A } & \$ 3 & \$ 4 & \$ 2 \\\text { Job } & \text { B } & \$ 1 & \$ 3 & \$ 5 \\& \text { C } & \$ 6 & \$ 4 & \$ 2\end{array}$$

Let X?? = 1 if job i is assigned to machine j,otherwise 0.

A) XA? + XB? + XC? = +1
B) XA? + XB? + XC? = 0
C) XA? + XB? + XC? = -1
D) 4XA? + 3XB? + 4XC? = +1
E) 4XA? + 3XB? + 4XC? = -1