Which of the following is not true with regard to functional authority?

Which of the following is not true with regard to functional authority?

Which of the following is not true with regard to functional authority?

[A] Functional authority is the authority staff members have over line members within the limits of their functions

[B] Functional authority has the same effect as line authority but it doesn’t have the right that line authority has, to punish violations or deviations in order to ensure compliance

[C] Functional authority is limited to those areas where a staff member has some technical competence

[D] Functional authority is in sync with the principle of unity of command.