Triple

Target entity: d’Alembert’s principle
Context triple: [Traité de dynamique, mainSubject, d’Alembert’s principle]

• A. d’Alembert’s principle chosen
  d’Alembert’s principle is a fundamental concept in classical mechanics that reformulates Newton’s laws to analyze the motion of systems by introducing inertial forces so they can be treated as if in static equilibrium.
• B. principle of least action
  The principle of least action is a fundamental concept in physics stating that the path taken by a physical system between two states is the one for which a specific quantity called the action is minimized (or made stationary), forming the basis of Lagrangian and Hamiltonian mechanics.
• C. Euler–Lagrange equation
  The Euler–Lagrange equation is a fundamental differential equation in the calculus of variations that provides the condition for a function to make a functional stationary, forming the basis of Lagrangian mechanics and many physical theories.
• D. d’Alembert’s formula
  d’Alembert’s formula is a classical solution method for the one-dimensional wave equation that expresses the displacement of a vibrating string in terms of its initial shape and velocity.
• E. Traité de dynamique
  Traité de dynamique is an influential 1743 treatise by Jean d’Alembert that helped formalize classical mechanics and introduced what is now known as d’Alembert’s principle.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.