Final answer:
The essay by David Halperin builds upon the theoretical work of Michel Foucault, who contends that sexuality is socially constructed through bodies, behaviors, and social interactions.
Step-by-step explanation:
David Halperin's essay builds upon the theoretical work on sexuality of French philosopher and cultural critic Michel Foucault, who defines sexuality as "a set of effects produced in bodies, behaviors, and social relations." The correct answer to the question is A. Michel Foucault. Foucault's ideas on sexuality can be found in his influential The History of Sexuality. In his theoretical work, he proposes that sexuality is a complex array of behaviors, thoughts, and practices that are extensively influenced and shaped by societal norms and power relations rather than merely being a product of biological impulses or personal choices. This view aligns with the post-structuralist approach, suggesting that gender and sexuality are socially constructed phenomena.