Find the least common multiple of x² + x – 12 and x² + 2x – 15.

A) (x + 4)(x - 3)(x + 5)
B) (x – 3)(x + 5)(x – 4)
C) (x – 4)(x – 3)(x – 5)
D) (x + 4)(x – 5)(x – 3),