[Solved] Which of the following is a legal description of child pornography? A) The sexually explicit reproduction of a child's image and includes sexually explicit photographs. B) The permanent record of the sexual abuse or exploitation of an actual child. C) The visual depiction of a minor (as defined by statue) that is sexually explicit (not necessarily obscene unless required by state law). D) All of the preceding are legal descriptions of child pornography. HHI: The Herfindahl-Hirschman Index, a measure of market concentration used to determine the level of competition within an industry. HHI: A measure of market concentration used to determine the competitiveness of a market. Also known as the Herfindahl-Hirschman Index. HHI: The Herfindahl-Hirschman Index, a measure of market concentration to assess the level of competition within an industry. Herfindahl-Hirschman Index: A measure used to quantify the level of competition within an industry, calculated by squaring the market share of each firm and summing the total.