[Solved] Which of the following are not legitimate concerns about children and the Internet: A)invasions of privacy B)explicit pornography C)online harassment D)all of the above are legitimate concerns Production Level: the quantity of goods and services produced by a business or economy within a certain period. Perfectly Elastic: Describes a market condition where demand or supply responds instantaneously to changes in price with an infinite change in quantity demanded or supplied, depicted as a horizontal line in graphical analysis. Elasticity of Demand: A measure of how much the quantity demanded of a good responds to a change in the price of that good, reflecting consumer sensitivity to price changes. Horizontal Line: A straight line that has a constant y-value in the plane Cartesian coordinate system, indicating no change in the vertical direction.