Whitney is at a crossroads in her life and is looking for additional avenues to explore her interests. a friend encourages her to attend a local environmental awareness group. two months later, whitney agrees to serve as the president of the rocky mountain hiking trail preservation society. according to schaie, whitney is likely in the stage of cognitive development. a. reintegrative
b. executive
c. achieving
d. responsible

The correct answer is b. executive.

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.