[Solved] After exposure to thirty minutes of sexually explicit film, or erotic but not sexually explicit film, sexual arousal is measured in female and male subjects with a penile strain gauge or a vaginal photoplethysmograph. What is the independent variable in this study? A)sexually explicit films B)the penile strain gauge or vaginal photoplethysmograph C)gender D)amount of sexual arousal Mutual Funds: Investment funds that pool money from multiple investors to purchase a diversified portfolio of stocks, bonds, or other securities. Front-end Load: A fee charged to an investor at the time of their initial investment into a mutual fund, typically used for the fund's sales commission. Expense Ratio: The measure of what it costs an investment company to operate a mutual fund, expressed as a percentage of the fund's assets. Mutual Fund: An investment vehicle that pools money from many investors to purchase a diversified portfolio of stocks, bonds, or other securities.