We wish to test if a certain vaccine developed for a disease is effective or not. What is the best way to do this? a)Vaccinate 100 animals and expose all 100 to the disease. Vaccinate 100 animals and expose 50 of them to the disease.

b)Vaccinate 50animals, do not vaccinate 50 other animals, and expose all 100 to the disease.

c)Vaccinate 50 animals, do not vaccinate 50 other animals, and expose the disease

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.