Which of these inferences is best supported by the following passage (paragraph 10)?
Across professional sports, in fact, one of the most obvious and quantifiable manifestations of gender-based discrimination is that women athletes face a huge pay gap. The total pay-out for the Women’s World Cup was 15 million United States dollars, compared with 576 million United States dollars for the last men’s World Cup — nearly 40 times more for men. The exception is tennis, which since 2007 has awarded equal prize money at all four Grand Slam tournaments.