In Which One of the Following Situations Has the Duty

In which one of the following situations has the duty between partners not been breached?

A) X, Y, and Z have a partnership in a restaurant business in Winnipeg. Unknown to his partners, Z opens a shoe store in Regina as well.
B) X, Y, and Z have a partnership in a restaurant business in Winnipeg. Unknown to his partners, Z opens up a restaurant in the same city as a sole proprietorship.
C) X, Y, and Z have a partnership in a restaurant business in Winnipeg. Unknown to his partners, Z is the major shareholder in a corporation that sets up a restaurant in the same city.
D) X, Y, and Z have a partnership in a restaurant business in Winnipeg. Unknown to his partners, Z owns 50% of the shares in the company that supplies the restaurant with its food supplies.
E) X, Y, and Z have a partnership in a restaurant business in Winnipeg. Unknown to his partners, Z runs a catering business during the evening using the restaurant's facilities.