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Astatistics professor at a small university wishes to investigate the effects oi an organic fuel on the gas mileage of vehicles. To generate a sample. he first compiles a list of all students with a panting pass. A random row on the list was selected and the student was added into the sample, From this row, every 12th entry was selected and added until a sample of 400 participants was accumulated. The variety of vehicles represented by the sample is judged to be adequate. From this sample, 200 participants were randomly assigned to \"Group A" while the remaining 200 were assigned to \"Group B". Participants in Grow A are tasked with recording their fuel mileage (mpg) for two weeks and can only refuel at a temporary retooling station \"X" which was setup by the professor. Similarly, participants in Group B must also record their mileage while only refueling at temporary station \"Y". The participants do not know what type of fuel is offered at station X or Y. Similarly, the service technicians at stations X and Y do not know what type of fuel is being provided. Only the professor knows that Group A{station X) has the organic fuel. A. v The population under consideration. A. 400 selected participants and their vehicles B. GmUpA c, Group B D. All gas-powered vehicles E. The type of fuel being used F. Gas mileage D. v The sample under consideration. F. v The explanatory variable in the study. E. v The response variabie in the study. C. v The controf group in the study. B. v The treatment group in the study