Answer:
a. Achieving
Step-by-step explanation:
The theoretical model proposed by Schaie is based on the fulfillment of motivational objectives throughout the life cycle that are answering the three questions explained above: what do I need to know ?; How do I put it into practice ?; Why do i know what i know? Under these three premises, Shaie proposes 7 stages of cognitive development
Achievement stage It includes from the end of adolescence (19-20 years) to approximately 30 or 31 years. The knowledge acquired is managed to achieve personal goals: finish a career, find a job, a family, we fulfill our expectations that have kept us motivated towards some objectives that we met based on the tools and skills acquired in the previous stage.