[Solved] If the sign of the first derivative of ATC with respect to Q is negative: A) ATC is increasing as Q increases. B) ATC is decreasing as Q increases. C) ATC is constant as Q increases. D) TC is increasing as Q increases. Online Pornography: Pornographic content available over the internet, accessible through various digital devices. STIs: Sexually Transmitted Infections, infections transmitted through sexual contact, caused by bacteria, viruses, or parasites. Practicing Safer Sex: Involves engaging in sexual activities that reduce the risk of transmitting or acquiring sexually transmitted infections (STIs) and unwanted pregnancies. Sexual Activity: The engagement in behaviors associated with sexual intercourse and pleasure.