What is the formula for the volume of a solid generated by revolving a polar curve around the x-axis?

A. Vx = ∫[α to β] (πr^2 sinθ cos^2θ dr/dθ - πr^3 cos^3θ) dθ
B. Vx = ∫[α to β] (πr^2 sinθ cosθ dr/dθ + πr^3 cos^3θ) dθ
C. Vx = ∫[α to β] (πr^2 sin^2θ cosθ dr/dθ - πr^3 sin^3θ) dθ
D. Vx = ∫[α to β] (πr^2 sin^2θ cosθ dr/dθ + πr^3 sin^3θ) dθ
Answer: 