Answer:
The correct answer is b. executive.
Step-by-step explanation:
The executive stage of cognitive development is the stage in which a person faces some responsible and higher position in an organization for example president of a society.
They face the responsibility to monitor the organization and activities going there and they also take responsibility for the supervising of the employee and their functioning. So here Whitney agrees to serve as president of the organization so she is likely in the executive stage of cognitive development.