After the Amalgamation of Satellite Sounds Ltd

After the amalgamation of Satellite Sounds Ltd.with RMK Broadcasting Inc.,human resource managers were assigned the task of changing job duties and reassigning responsibilities among the amalgamated workforce.Which of the following is the source of the employer's ability to effect changes of this nature without incurring liability to the amalgamated employees?

A) recital of management rights in employment contracts
B) company policies or reference to employee policy manual
C) employer's right to define description of work to be performed
D) employer's defined ownership of intellectual property