ATTENTION PARK VISITORS As of June 1st,2006, the Trenton County Department of Park Services is instituting the following rules50acceptable activities and behavior in Winfred Park: 1. As in all Trenton County parks, the consumption of alcoholic beverages is strictly prohibited. Also, open fires are not permitted under any circumstances. Food may only be cooked using the designated barbecue pits located at each picnic area. 2. Visitors wishing to hold a gathering of twenty-five people or more must first51with and receive a permit from the Trenton Country Department of Park Services. The cost of a large gathering permit is $10. 3. All minors swimming in Winfred Stream must be supervised by an adult. Please use52 when swimming, as currents and water levels can change quickly without warning. Questions con-cerning these regulations should be directed by phone, email, or letter to Jeremy Bodo, superinten-dent of the Trenton County Department of Park Services. 阅读以上短文，回答197-199题。 第50题答案是__________
A.outlining B.inputting C.withdrawing D.uplifting