Integrate the following expression: ∫(x^4 - sec²(x))dx. Which of the following options represents the correct integral? A) ∫(x^5/5 - tan(x))dx B) ∫(x^5/5 - sec(x))dx C) ∫(x^4/4 - tan(x))dx D) ∫(x^4/4 - sec(x))dx