[Solved] In project network analysis, "slack" refers to the difference between A)observed and predicted times. B)optimistic and pessimistic times. C)mean and modal times. D)finish and start times. E)latest and earliest times. Sexual Activity: Human behaviors that include the sexual act and practices related to physical intimacy. Protection: Measures or actions taken to keep something safe from harm, damage, or injury. Online Pornography Exposure: The experience of encountering sexually explicit material on the internet, which can have various psychological effects. Erectile Problems: Refers to the difficulty in achieving or maintaining an erection that is firm enough for sexual activity.