Factor 15x3 – 5x2 + 6x – 2 by grouping. What is the resulting expression?

(5x2 + 2)(3x – 1)
(5x2 – 2)(3x + 1)
(15x2 + 2)(x – 1)
(15x2 – 2)(x + 1)

(5x2 + 2)(3x – 1)