An advertisement makes the claim: "Lighter shoes make you run faster." Of the following, which is the best way to investigate this claim? Group of answer choices Choose the records of the top twenty runners who are wearing the lighter shoes and compare their times to run 400 meters before and after they began wearing the shoes. Choose twenty runners and select ten at random to wear lighter shoes and have the other ten wear heavier shoes to run 400 meters and compare their times. Choose twenty runners at random and have the women wear the lighter shoes and the men wear the heavier shoes to run 400 meters and compare their times. Choose to observe the results of 400-meter races for the next year and see how many winners are wearing the lighter shoes
