In Agency Law,to Accomplish the Establishment of a New Principal-Third

In agency law,to accomplish the establishment of a new principal-third party relationship,agents

A) should keep the principal fully informed.
B) must guarantee profit from sale of goods to the principal.
C) should charge the lowest fees to the principal for the performance of the duty.
D) must avoid ratifying any contract entered by the principal.
E) must express apparent authority while entering into a contract with contractors.