Randy hires the Bernard Law Firm to locate and negotiate the purchase of an existing restaurant specializing in Native American cuisine. The Bernard Law Firm places a junior partner, Rodrigo, in charge of the deal. Rodrigo owns a small share of a restaurant specializing in Native American cuisine and places it on the list of prospective purchases. Randy chooses to purchase Rodrigo's restaurant. Which of the following is true?

a$.$ Rodrigo has no obligation to tell Randy about his ownership interest.

b$.$ Rodrigo must disclose his ownership interest after the sale is complete.

c$.$ Rodrigo has not violated his duty as an agent because he presented Randy with multiple options.

d$.$ Rodrigo must disclose his ownership interest in the property before the sale.