Which situation(s) describe(s) a parameter? There may be more than one correct answer. Select all that apply.

A: At one of 20 concession locations, 40% of the purchases come from hot dogs, 2% from hamburgers, 40% from drinks, and 18% from snacks. Based on this information, the concession manager decides to stop selling hamburgers at all locations.

B: Of the 20,000 fans attending a playoff game between the Lions and Sharks, 700 are season ticket holders.

C: Apparel accounted for 40% of the merchandise purchased at a playoff game between the Lions and Sharks.

D: A crowd of 20,000 fans attends a playoff game between the Lions and Sharks, and 5% of the tickets were purchased at the ticket booth that day.

E: A crowd of 20,000 fans attends a playoff game between the Lions and Sharks. A poll of 500 fans reveals that 60% of the crowd wants the Sharks to win.