Vt dt = 8. Use substitution to find the indefinite integral. 3u du Describe the most appropriate substitution case and the values of u and du. Select the correct choice below and fill in the answer boxes within your choice. O A. Substitute u for the quantity under the root. Let v = so that dv = du. O B. Substitute u for the quantity in the numerator. Let v = , So that dv = du. O C. Substitute u for the quantity in the denominator. Let v = , So that dv = ( du. Use the substitution to evaluate the integral. 3u du = VU - 7 9