In consistent deformation method, what is the fundamental equation that relates applied loads to displacements?

A$.$ Hooke's Law.

B$.$ Castigliano's theorem.

C$.$ Principle of virtual work.

D$.$ Compatibility equation.

E$.$ Equilibrium equation.

In consistent deformation method, what property ensures that internal displacements are compatible with external displacements?

A$.$ Stiffness matrix.

B$.$ Flexibility matrix.

C$.$ Kinematic matrix.

D$.$ Complementary matrix.

E$.$ Transformation matrix.

$($A$)$

$($B$)($C$)($D$)($E$)$

What is the basic idea behind the consistent deformation method?

A$.$ Reducing a complex structure to simpler components.

B$.$ Ensuring compatibility between internal and external displacements.

C$.$ Distributing loads evenly throughout the structure.

D$.$ Minimizing the strain energy in the structure.

E$.$ Maximizing the stiffness of the structure.

$($A$)($B$)($C$)($D$)($E$)$