Mark Twain's works are characterized by the following except ______.

A．Moderate drinking protects against heart attacks and strokes in different ways.
B．Even heavy drinkers suffer less chance of a stroke than non-drinkers.
C．Alcohol works only on patients who suffer clot-type strokes to protect them.
D．White people are more likely to benefit from moderate drinking than nonwhites.

A．heart attacks are more likely caused by alcohol than stroke
B．moderate drinking, discourage blood platelets from clotting
C．boosting the levels of good cholesterol can lead to heart attacks
D．moderate drinking protect people by making the blood cell clump