Duty to the court

What ethical duty of the attorney to the court is being violated by knowingly presenting false testimony to support the client's case?

A defense attorney is representing a client in a criminal case. During the trial, the attorney presents a witness whom they know will give false testimony to support the client's alibi. The attorney is aware that the alibi is fabricated, but they proceed with the false testimony in the hope to secure a win for the client.

Choices:

A) The duty of confidentiality

B) The duty to the court

C) The duty of impartiality

D) The duty to the client