f f is a linear function on the interval [a,b], then a midpoint Riemann sum gives the exact value of Integral from a to b f left parenthesis x right parenthesis dx for any n. Is the statement true or false? Explain. A. False; the only time a Riemann sum give an exact value of an integral is when f is a constant function. B. False; only a left or right Riemann sum gives an exact value of the integral. C. True; for each Riemann sum rectangle, the part of the rectangle that is beyond the linear function is equal to the area under the linear function and beyond the rectangle. D. True; the Riemann sum gives an approximation of an integral and never an exact value