Let X be a continuous random variable with probability density function f (x) and cumulative distribution function F(x). Then for any two numbers a and b with a < b, which of the following inequalities is true? A. P (a ≤ X l≤ b) = F (a) - F (b) B. P (X > a) = 1 - F (a) C. F (x) = (x - a)/(b - a) D. P(X > b) = F(b) - 1