Which of the Following Vertices of the Constraint Region Shown $$z = - 6 x - 4 y + 2$$

Multiple Choice

Which of the following vertices of the constraint region shown is a minimum value of the objective function below. $$z = - 6 x - 4 y + 2$$

A) only vertex B
B) vertices B and C
C) vertices A and B
D) only vertex D
E) only vertex C