Scenario: The mean score for all high school seniors taking a college entrance exam is 500. Advocates for a charter school boast that their program helps to increase student exam scores. For a random sample of 100 students from the charter school, the mean exam score is 516 with a standard deviation of 90. Test the school's claim that their program improves student test scores. Question: In symbols, the null hypothesis for this test would be: (:2 \"=500 :7 \"=516 T #35500 A #35516