select the correct answer.\nfastex shoes clai...
select the correct answer.\nfastex shoes claims that it has designed a new range of lightweight shoes that allow athletes to run faster than they can using any other shoes. sportsplus, a rival shoe manufacturer, then came up with a design that it claims performs even better than fastexs design. a sports magazine decided to test the claims. it created two groups of 15 randomly selected athletes each. members of both groups were pre - tested and determined to have equal athletic ability. additionally, they followed the same nutrition plan and training program during the study.\nthe athletes did a 1 - mile run to test the shoes. the magazine found that the athletes who used fastex shoes had reduced their 1 - mile run time by an average of 3%, and athletes who used sportsplus shoes had reduced their 1 - mile run time by an average of 2%.\ngiven the magazines data collection method and findings, what conclusion can be made?\n\na. the data collection method used was unfair since the athletes given fastex shoes may have been better runners than the athletes given sportsplus shoes.\n\nb. the data collection method used was random since the athletes in the two groups used two different shoe designs.\n\nc. the data collection method used was non - random since the athletes using fastex shoes may have trained better.\n\nd. the data collection method used was fair since both shoe designs were tested on identical parameters.