If Image for If int 0 between 6 x^2 + 2 d dx is approximated by three inscribed rectangles of equal width on the x-axis, th is approximated by three inscribed rectangles of equal width on the x-axis, then the approximation is
A) (24)(2)
B) (26)(2)
C) (28)(2)
D) (48)(2)
E) (76)(2)