Which Statement Regarding the Concept of "Constraints on Action" Is

Which statement regarding the concept of "constraints on action" is not true?

A) They are factors that limit or "constrain" the possible movement outcomes as a child performs a functional action.
B) They can relate to the performer, the task, or the environment.
C) They are theoretical concepts that have yet to be applied to the clinical environment.
D) They can be linked to the concept of control parameter from the Dynamic Systems Perspective on motor learning.