The answer is B (horsetails). Hope this helps!
The flu vaccine is a medicinal shot which is supposed to prevent/ and or decrease your chances of getting the flu. It is supposedly working as stated by the producers of this vaccine however many children have been given this vaccine and it dosen`t work. The recommendations are appropriate as it is better to be safe than sorry. However there are some negative effects. For example a person would get a cold afterwards and this of course is sickness. Overall, I recommend not highly, but as i stated earlier it is better to be safe than sorry.
There are four major blood types determined by presence or absence of two antigens - A and B - on the surface of red blood cells, as well as antibodies A and B found in blood plasma.
Blood type A - red cells have A antigen and B antibody in plasma
Blood type B - red cells have antigen B and antibody A in plasma.
Blood type AB - red cells have both A and B antigens but no antibody in plasma.
Blood type O - red cells have no antigen but there are both antibody A and B in plasma.
A single species that has evolved into several different forms that live in different ways has undergone "b. convergent evolution" since the multiple "divergent" species are seen to "converge" into a single species if you go back far enough in time.