[Solved] ________ suggests that unit production costs decline by some fixed percent each time the total accumulated volume of production in units doubles. A) The experience curve B) The R&D mix C) Technological competence D) Economy of scale E) Economy of scope Erotic Preferences: An individual's patterns of sexual attraction and desire towards certain stimuli or sexual practices. Sexual Identity: An individual's identification and expression of their sexual orientation, preferences, and behaviors. Androgens: A group of hormones that play a role in male traits and reproductive activity; present in both men and women but at higher levels in men. Prenatal Development: The process of maturing and evolving from the point of conception to birth within the uterus.