Which evidence best supports the claim that participating in a team sport improves students’ academic performance? a) some teachers at our school think that participating on a team is not always the best way to improve grades. b) advertising posters made by a sportswear company suggest that all athletes are exceptional students. c) a chart based on a long-term study illustrates the direct relationship between team membership and above-average grades. d) coach herbert has encouraged every student at wilson middle school to join the cross-country team this spring.