Which of the following are maximum and minimum points of the function y = 2 cos x – 1?

A) Maximums: (0, 3), (2π, 3); Minimum: (π, –3)

B) Maximums: (0, 3), (2π, 3); Minimum: (π, –1)

C) Maximums: (0, 1), (2π, 1); Minimum: (π, –3)

D) Maximums: (0, 1) (π∕2, 1); Minimum: (3π∕2, –3)