68. Which of the following statement is incorrect？
(A)Roller, twist, or triangular drill bits shanks should only be used in a drill presschuck.
(B)The blade on the portable circular saw should be aligned on the waste side of themarking line when making a cut.
(C)Press your wood against the upward moving side of the disc while using the DiscSander.
(D)When installing a blade of a scroll saw, ensure the teeth point downward.