MCQ PracticeIn the short-run, average cost, average variable cost and marginal cost curves are U-shaped due to the operation ofSubject: AgricultureTopic: Agricultural EconomicsALaw of equimarginal returnsBSubstitution between two factor inputsCLaw of variable proportionDTime comparison principleCorrect Answer: CPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the