The function f(t) = 4t^2 − 8t + 6 shows the height from the ground f(t), in meters, of a roller coaster car at different times t. write f(t) in the vertex form a(x − h)^2 + k, where a, h, and k are integers, and interpret the vertex of f(t).

a - f(t) = 4(t − 1)^2 + 3; the minimum height of the roller coaster is 3 meters from the ground
b - f(t) = 4(t − 1)^2 + 3; the minimum height of the roller coaster is 1 meter from the ground
c - f(t) = 4(t − 1)^2 + 2; the minimum height of the roller coaster is 2 meters from the ground
d - f(t) = 4(t − 1)^2 + 2; the minimum height of the roller coaster is 1 meter from the ground