The Linear Programming Problem Has an Unusual Characteristic

Multiple Choice

The linear programming problem has an unusual characteristic.Select a graph of the solution region for the problem and describe the unusual characteristic.Find the minimum value of the objective function (if possible) and where it occurs. ​
Objective function:
​
Z = x + y
​
Constraints:
​
X ≥ 0
Y ≥ 0
-x + y ≤ 1
-x + 5y ≤ 7
​

A) Minimum at (0,1) : 1
B) Minimum at (1.5,0.5) : 2
C) Minimum at (0.5,1.5) : 2
D) ​ Minimum at (0,0) : 0
E) No minimum.