Brant is preparing for the upcoming track season, and he wants to reduce the time of his 1-mile run. last year, he conducted an experiment to judge the effectiveness of two training programs: q30x and intensity. he randomly selected 10 of his competitors and asked 5 of them to use the q30x program and 5 of them to use the intensity program. to test the effectiveness of the programs, brant compared their average 1-mile run time after using the program to their average 1-mile run time before using the program. he found that those who used the q30x program improved their average 1-mile run time by 5% and those who used the intensity program improved their average 1-mile run time by 7%. which of the following statements properly describes the results of brant's experiment? a. the q30x program and the intensity program are both effective because the average participant 1-mile run time was reduced for each program, but the intensity program is the more effective program because it yielded a greater decrease in the average participant 1-mile run time. b. the q30x program is the only effective program because the average participant 1-mile run time had the greatest decrease, but the intensity program is not effective because it yielded a smaller decrease in the average participant 1-mile run time. c. the q30x program and the intensity program are both effective because the average participant 1-mile run time was reduced for each program, but the q30x program is the more effective program because it yielded a greater decrease in the average participant 1-mile run time. d. the intensity program is the only effective program because the average participant 1-mile run time had the greatest decrease, but the q30x program is not effective because it yielded a smaller decrease in the average participant 1-mile run time.