Paulette Appointed Angie to Be Her Agent to Purchase a Building

Paulette appointed Angie to be her agent to purchase a building lot for a warehouse in a large city.Angie owns several suitable lots,and a week after the agency arrangement was entered into,said to Paulette,"You know,I own a couple of lots that might work and that I might be willing to sell." Angie and Paulette then agree on a price for Paulette to buy one of the lots.Angie has:

A) not violated any of an agent's duties
B) violated the duty of loyalty by usurping an opportunity
C) violated the duty of loyalty by competing with the principal
D) violated the duty of loyalty by self-dealing
E) violated the duty of loyalty by engaging in a dual agency