What is the domain of the rational function f(x) = (x + 3) / (x² - 4x - 12)?

✓ Correct Answer: Option B

The domain of a rational function excludes values where the denominator is zero. Factor the denominator: x² - 4x - 12 = (x - 6)(x + 2). Setting it to zero gives x = 6 or x = -2. Thus, the domain is all real numbers except x = 6 and x = -2.