What is the constant multiple property of definite integrals?

• A. \(\int_a^b\)k⋅f(x)dy
• B. \(\int_a^b\)[f(-x)+g(x)dx
• C. \(\int_a^b\)k⋅f(x)dx
• D. \(\int_a^b\)[f(x)+g(x)dx