[Solved] Which of the following is true of the purchasing role of influencers in a buying center? A)They control the flow of information in the buying center. B)They have the formal power to select a supplier for contract. C)They have the informal responsibility to negotiate terms of a contract. D)They affect a buying decision by helping define requirement specifications. Successful Long-Term Relationships: Relationships that are thriving and enduring, marked by mutual understanding, respect, and love. Paternity Uncertainty: The impossibility for a male to be absolutely certain that he is the biological father of a child, due to the nature of internal fertilization and gestation in females. Extradyadic Sex: Sexual activity that occurs outside of a committed relationship, often considered a breach of exclusivity. Erotic Plasticity: The degree to which an individual's sex drive and sexual interests can change based on various social, environmental, and situational factors.