B. is the correct answer. It makes sense too because vaccines are usually inserted in a vein, which is where the bloodstream is. With all of this medicine in your body, the virus will come into the body, the body will recognize what the virus is, sending out the antibodies from the vaccine into the bloodstream and all around, then the virus is dead. :)
Answer:
are made of mostly helium and hydrogen
Explanation:
Climate, geology, topography, hydrology and soils all play a part in the formation and function of watersheds. These factors provide habitat, nutrients, flow and water quality that aquatic organisms need to survive.
