Can someone please help me with this question? This is a method of substitution. In the last part I did wrong what is the correct answer?

Find the area of the region bounded by the graph of f(x) = x sin x and the x-axis between x = 0 and X = VI. Determine a change of variables from x to u. Choose the correct answer below. CA. U=X2 O B. u = sin x2 O C. U=X O D. u=x sin x2 Write the integral in terms of u. VIT x sin x dx =] sin (U) 7 du O 0 sin u The area of the given region is 2 -du (Simplify your answer.)