According to developmental psychologist k. warner schaie, the point reached by young adults in which intelligence is applied to specific situations involving the attainment of long-term goals regarding careers, family, and societal contributions is called the stage.

acquisitive stage

Explanation:

K. Warner Schaie is an American social psychologist born in 1928 and is mostly recognized for founding the Seattle Longitudinal Study in 1956. According to my research on Schaie's studies, I can say that based on the information provided within the question this is called the acquisitive stage. This stage pertains to children under the age of 18 and in this stage individual’s primary cognitive task is to acquire knowledge and intellectual skills

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the answer is:

c. economic output

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