Let ( f(x) = (x - 1)³(x + 1)³ ). What are the relative extreme values, if any, of the function?
a. There is no relative minimum value and no relative maximum value.
b. There is no relative minimum value and a relative maximum value of 0.
c. There is a relative minimum value of 1 and no relative maximum value.
d. There is a relative minimum value of 1 and a relative maximum value of 0.