Final answer:
The correct answer is option B. Individuals with type B or type O blood would exhibit increased resistance to venereal syphilis, which has antigens similar to type A blood.
Step-by-step explanation:
In terms of the antigen-antibody model of specific immune response, individuals with type A or type B blood produce antibodies against antigens they do not have on their red blood cells. For example, someone with type A blood has preformed anti-B antibodies circulating in their blood plasma. Similarly, an individual with type B blood has preformed anti-A antibodies.
If venereal syphilis has antigens similar to type A blood, individuals with type B or type O blood would exhibit increased resistance. This is because these individuals have antibodies that would recognize the antigens on the syphilis bacteria and mount an immune response against them.
Therefore, the correct option is B) Those with Type B or O blood.