Pick up the correct statement from the following:
(A) If the slope of the curve of a mass diagram in the direction of increasing abscissa is
downward, it indicates an embankment
(B) The vertical distance between a maximum ordinate and the next forward maximum ordinate
represents the whole volume of the embankment
(C) The vertical distance between a minimum ordinate and the next forward maximum ordinate
represents the whole volume of a cutting
(D) All the above