Evaluate the integral of powers of sine and cosine. Which of the following options represents the integral of sin^10(x)cos^3(x) dx?

A. ∫ sin^10(x)cos^3(x) dx
B. ∫ sin^11(x)cos^3(x) dx
C. ∫ sin^10(x)cos^4(x) dx
D. ∫ sin^9(x)cos^3(x) dx