Did Sandra Commit Any Breach of Duty to the Partnership

Did Sandra commit any breach of duty to the partnership?

A) Yes, she breached her fiduciary duty to the other partners.
B) Yes, she breached her duty of integrity to the other parties.
C) Yes, but only if the other partners can show that she made more income through doing the work on her own than she would have made if she had done the work through the partnership.
D) No, but only because she held two-thirds of the voting rights and could approve the work herself.
E) No, she did not breach any duty.