Triple

Target entity: The Theory of Political Economy
Context triple: [The Coal Question, relatedWork, The Theory of Political Economy]

• A. The Theory of Political Economy chosen
  The Theory of Political Economy is an influential 1871 book by William Stanley Jevons that helped found marginalist economics by emphasizing utility and marginal analysis in value theory.
• B. On the Principles of Political Economy and Taxation
  On the Principles of Political Economy and Taxation is an 1817 treatise by David Ricardo that systematically develops classical economic theories such as comparative advantage, rent, wages, and profits.
• C. The Principles of Political Economy
  The Principles of Political Economy is a major 19th-century treatise by philosopher and economist Henry Sidgwick that systematically analyzes economic theory and policy within a utilitarian ethical framework.
• D. Principles of Political Economy
  Principles of Political Economy is John Stuart Mill’s influential 1848 treatise that systematically analyzes classical economics while integrating social and ethical considerations into economic theory.
• E. Principles of Political Economy
  "Principles of Political Economy" is an economics treatise by American astronomer and economist Simon Newcomb that analyzes the foundations and functioning of market economies in the late 19th century.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.