Given f(x) = 2x - 1 and g(x) = x^2 + 3, what is (g o f)(x)?

✓ Correct Answer: Option B

(g o f)(x) means g(f(x)). Substitute f(x) into g(x): g(2x - 1) = (2x - 1)^2 + 3 = (4x^2 - 4x + 1) + 3 = 4x^2 - 4x + 4.