QUESTION Look at the trend in concussion rates across all sports between the 2004 - 2009 reporting period and the 2009- 2013 reporting period. Which line of reasoning is the best explanation for these data? The actual concussion rates may not have changed, but a greater awareness of the problem has caused more of the injuries to be diagnosed and reported. The concussion rates are going up because the sports have become significantly more aggressive in the past few years. The actual concussion rates may not have changed, but athletes are learning how to better hide their symptoms so they can continue playing, causing a decrease in the reported injuries. Better equipment and safer rules have led to a decrease in the rate of injuries.A bar graph with the title, "Concussions by Year, Sport, and Gender". The X axis is labeled with 14 sports, which contain two or three bars each. These bars represent the three years for which data was collected, including high school from 2010 to 2012, college from 2004 to 2009, and college from 2009 to 2013. The Y axis represents the number of concussions per 10,000 events and ranges from 0 to 15 in increments of 5. The following table represents the approximate data that displays in the graph. Number of concussions per 10,000 events Sport High School College College (2010-2012) (2004-2009) (2009-2013) Men's football 11 6 6 Women's ice hockey No data 7 5 Men's ice hockey No data 6 Women's lacrosse 5 6 5.5 Men's lacrosse 7 6 3 Women's soccer 6 6 Men's soccer 4 4 3 Men's wrestling 6 5 12 Women's field hockey 4 14.5 Women's basketball 5.5 5 6 Men's basketball 2.5 3 Women's softball 1.5 2 Men's baseball 0.5 Women's volleyball 2 1.5 315 NEUROSCIENCE AND BEHAVIOR 10 5 Concussions by Year, Sport, and Gender M s Football Women's Ice Hockey Men's Ice Hockey Women's Lacrose Men's Lacrosse Wom en's Soccer Men's Soccer Men's Wrestling Women's Field Hockey Wo en's Basketball - HS 2010- 2012, - College (2004 - 2009), - College (2009 - 2013) Men's Basketball Women's Softball Men's Baseball Women's Volleyball