The Main Difference Between Shadow Prices and Lagrange Multipliers Is

The main difference between shadow prices and Lagrange multipliers is

A) the range of RHS values over which the Lagrange multipliers or the shadow prices remain valid
B) that shadow prices overestimate the impact of a small change in the RHS of the constraints on the objective function
C) that shadow prices underestimate the impact of a small change in the RHS of the constraints on the objective function
D) they are equivalent