Find the coordinates of the vertices of the figure formed by each system of inequalities.
y + x ≥ –4
y ≥ x – 6

3y + x ≤ 10

A(1, –5), (–14, 8), (–11, 7)

B(1, 5), (7, 1), (11, 7)

C(1, 7), (–11, 1), (7, –5)

D(1, –5), (7, 1), (–11, 7)