March 03, 2010 
A. disease
B. height
C. all of the above
D. Blood groups
E. none of the above
Disease would kill those genetically susceptible to the disease, causing evolutionary selection of the population of the species that are more resistant to the disease.
Resistance to disease (e.g. in some bacteria and height can be an advantage (e.g. in giraffes), assuming both are genetically determined.
It has been shown that blood type does not cause any selective pressure in humans.
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