The graph of the function f(x) = –(x + 3)(x – 1) is shown below.

which statement about the function is true?

the function is positive for all real values of x where
x < –1.
the function is negative for all real values of x where
x < –3 and where x > 1.
the function is positive for all real values of x where
x > 0.
the function is negative for all real values of x where
x < –3 or x > –1.