Find the vertices of a hyperbola with the equation (x + 3)^2 - 4(y - 2)^2 = 4.

a. (-4, 2) and (-2, 2)
b. (-5, 2) and (-1, 2)
c. (4, -3) and (0, -3)
d. (3, -3) and (1, -3)