Consider your decision to read this textbook on economics. Identify which of the four core principles of economics is most relevant for each aspects of that decision. a. "Reading this textbook will help establish a solid foundation for understanding concepts you will learn in more advanced economics courses." This statement is related to the opportunity cost principle. b. "Reading this textbook will require time and effort, but doing so will help you improve your grade in this course." This statement is related to the opportunity cost principle. c. "The time you will spend reading this textbook can also be used to study for your chemistry exam." This statement is related to the opportunity cost principle. d. "Each page that you read and each practice problem that you complete will help you increase your understanding of the material." This statement is related to the opportunity cost principle. marginal cost-benefit opportunity cost interdependence